They should give you a 1099 if they paid you $600 or more. If they are paying you "under the table" (which is illegal) they probably won't send you one.
Huh... they're not paying me under the table, it's through Amazon Payments, but I don't think they sent out a 1099... at least I don't remember getting on last year. All I did was print out a copy of the total amount I made from their website and that seemed to satisfy everyone...
Anyway, hopefully it'll all work out. Been trying to save for this time of the year, but you know how things are....