It should be in most text areas across a BuddyPress site already. You may need to add a few lines of custom JS to get it to hook into your theme. Once I am home this evening, I’ll update this post with details.
@djpaul cool thanks…
it is a little slow though…how can that be improved.
There are lots of things that could go “a little slow”, and quite a few reasons, too. I’m not sure I can do anything, but if you can record a video of the slow behaviour, that would help explain where/when it occurs 
Hi @djpaul,
thanks for the autosuggests! Bp-labs it´s really a nice plugin, hope some features can be integrated on BP-core.
I´m having a problem with autosuggest in some text areas. It´s normal in activity, but doens´t appear in comments text areas.
Any trick?
Thank u and regards,
Felipe
Me again:
@DJpaul, I´ve just saw autosuggests will problaby be on BP 1.7, but autosuggest in comments text areas are now ok for buddypress default theme, right? Would you please tell us the way in wich we can adjust the plugin for others themes?
Thanks, Felipe