Thumbs work only for premium members BUT you can send a thumb to anyone and it will appear like this : thumb270871608 : and if they have a premium and they post it in journals and stuff the thumb will work, even if you dont have premium.
Thumbs only work in chat rooms, forums, journals, notes and descriptions but again only if you have a membership that you can get from 396 or $4.95 for one month.
No under Pictures.
Notes i don't know.
Plus I'm not sure I actually need a membership. I'm not sure I'd know what to do with it anyway. Are there other fancy things to membershipping besides the whole thumbs thing?