Ideally you need access to a news server, but if you don't have that you can subscribe thru Google Groups. In the newsgroups sci.lang.translation and sci.lang.translation.markedplace you can promote yourself and your services as well as finding contracts. Usenet newsgroups are free for everyone and has a lot of traffic, they provide an excellent alternative to the subscriptionbased jobsites

Babel Translation Jobs is a group on Yahoo open for all

Translation Depot is a group on Yahoo and it is open for all