Bloo does give you the option for notifications other than the lame choices on the installed FB app~ inbox mssgs, pokes, friend requests and event invites.
Bloo will notify you of comments which is what most FB users would like anyway! you have to choose how often to check for notifications, every minute, 2 min, 5 min, 10 min, 20 min or 30 min. so you can set it to 1 min, and it pretty much is instant notification.
ive only been using bloo for about 2 days, since i just heard about it, and so far its going ok. i dont like that the pictures come up as green squares, like they are taking a long time to load or something.. but it is better that is actually more like an app than the stock FB app, which that is more like a shortcut to the mobile site. that aggrivates me.
and still, you cannot sent private messages with bloo. and i havent figured a way to go to a link someone has posted .
FB has a long way to go still on the droid (or is it android in general?) , but im sure someone will figure out something soon. hopefully we will soon have a FB app similar to the iPhone app with the addition of instant notifications