Egyptian, Libyan and Iranian bloggers are spending time in jail as a punishment for words they have written on their blogs. Committee to protect bloggers has more details as well as links to petitions you can sign.
Meanwhile, I have found contact information for Egyptian embassies in some countries, you can do your part and call or (at least e mail) them and demand they free the imprisoned blogger.
Phone (202) 895 5400
Tel. (613) 234 4931
Tel: 020 7499 3304
Tel: (61 2) 273 4437, 6273 4438