Prominent Egyptian activists Alaa Abd El Fattah , his sister Mona Seif , and ten others on January 5 received a one-year suspended sentence in a case in which they were accused of torching the headquarters of ex-Presidential candidate Ahmed Shafiq’s campaign. This is one of many cases that has Egyptian and international activist communities worried about the government’s apparent backlash at those active in fueling the January 25 revolution in Egypt in 2011.
— Rasha Abdulla (@RashaAbdulla) January 5, 2014 
Tweet showing Mona Seif coming out of the court hall where she was just handed a one-year suspended sentence.
Alaa did not attend the court session. He has been detained since November 28, after being accused of organizing a protest in front of The Shura Council (the upper house of Egypt's Parliament) without obtaining legal permission. Two days prior to the protest, legislators passed a law  requiring all protest organizers to submit logistical information about planned protests to the Ministry of the Interior. Under the new policy, the Ministry reserves the right to (indefinitely) require a change of logistics. Practically speaking, this enables the Ministry to prevent protests from taking place, if it so chooses.
The protest in question was organized by the No to Military Trials for Civilians  group, a campaign initiated by Mona Seif but of which her brother Alaa is not a member. The group has issued a press statement claiming responsibility for the organization of the protest. Members of the group have also filed a report with the public prosecutor claiming responsibility for the event. The protest, which took place on November 26, called for the abolishing of military trials for civilians in the new constitution which Egypt is to vote on later this month.
The protest was violently dispersed by the police roughly half an hour after it began. Police detained 11 women, most of them members of the No to Military Trials group, and 24 men. The women, all of whom were beaten and some of whom were sexually harassed while being detained, remained in custody for a few hours. They were then forced to ride a police car and thrown in the desert sometime after midnight. The men were detained for a week and are now released (except for one, Ahmed Abdel Rahman) pending investigation. Alaa was detained after police stormed his house two days later and accused him of organizing the protest. This allegation came despite the fact that Alaa waited outside the police station where his sister was detained on November 26 all evening until she was picked up by friends after police threw her and her colleagues in the desert. Although both Alaa and Ahmed Abdel Rahman have been detained for over a month pending investigation, no court date has been assigned yet for the case.
The suspended sentence  should allow the activists to serve a period of probation, rather than jail time, on the condition that they abide by the law during this period.
These are not the only two cases currently in progress against prominent activists in Egypt. Ahmed Maher , Ahmed Douma, and Mohamed Adel have all recently been given a hefty 3-year-sentence  with hard labor in another case, in which they were also accused of organizing a protest without permit. Maher is the founder of the April 6 Youth group, and Adel is the group’s spokesperson. The three activists have also been each fined EGP 50,000 ($7,000) each, and would be put on probation for another three years if found guilty. The activists have appealed the sentence, but they currently remain in prison.
In Alexandria, long-time activists Mahinour El Masri and Hassan Mostafa, along with four others, were convicted of organizing a protest without permit, and were given two-year prison sentences  and a fine of EGP 50,000 ($7,000) each. Hassan Mostafa had just been released from jail in November after the public prosecutor suspended a one-year-sentence he received for slapping a prosecutor while filing a complaint for torturing detainees.
Activists in Egypt believe these cases and others are merely political in nature, and meant to keep prominent activists behind bars while intimidating others to keep them away from the political process. The government passed the Protest Law  in November claiming it was necessary to control the chaos created mostly by Muslim Brotherhood sympathizers in clashes with security forces that often turned violent. Since it has been put in effect however, the law has been used to crack down on all kinds of opposition, including peaceful protesters, and individuals and groups that have been closely associated with the January 25 revolution and its aftermath.
More coverage of Alaa's case:
Prison Flees: Reflections on Alaa, Activism, and Community  Jan 9, 2014
On Alaa, Learning, and the Struggle  Jan 9, 2014
Egyptian Activist Alaa Abd El Fattah Arrested — Again  Nov 29, 2013