personally i havent got much out of these, but they are the only ones i know about. your best bet is to open random links on identiguy or notbob and do some research by yourself.
i2psearch
http://d4jtslmsku66nmq7u3mpyhqb3cw3operuhldvegkectmakmf6jiq.b32.i2p/
legwork
http://cuss2sgthm5wfipnnztrjdvtaczb22hnmr2ohnaqqqz3jf6ubf3a.b32.i2p/
there's also bandura-yacy or just bandura, but they have been down for quite a while.