So, is anybody here actually active on academia.edu? Asking, since as a computer vision researcher (3D reconstruction, obstacle recognition/identification, augmented reality, ...) I am constantly looking for scientific resources, and to be frank, it is quite annoying because it can become really time consuming.

So a genuine question, is the site worth signing up for? I remember when mendeley just started, there was lots of excitement about it, mainly because it was sort of marketed as the last.fm of research (giving you good recommendations for your scientific interests), but then it turned out to be just meeh (getting bought by Elsevier didn't help much ;-).

Also, on a side note, are there any other good sites doing something similar out there (like a reddit/HN for insert your research interests here type of site) that are actually any good? I'm sure there must be a lot of other researchers active on HN...