[Windbreaker]

Some of the best sign up/monthly bonuses through affilates and the poker sites I know of: -> Most of these I have done myself and are legit.

I Global Media
Empire - $250 + $100 from empire + rake back
Party - $150 + $90 worth in gift certificates
EuroBet - $200/$500 + rake back
Intertops - $100 + rake back
*PokerNow will be taken over by Party soon - there's been a big fiasco involving rake back and what not....I believe you still can get the first time bonus -> some say it's $100 at 5x 20%, but do so at your own risk

Prima - most sites consider any dealt hand raked over $0.25 as a raked hand
Golden Tiger/Poker Rewards - $200 - 1000 raked hands + affilate offer worth $60 in gift certificates
Golden Riveria - $50 deposit bonus - +$20 stackable reload every weekend (Requires 100 raked hands to clear everything)
Bet Holdem - $100 - 700 raked hands + $60 gift certificates
Gaming Club - Up to $300 + $60 gift certificates
Bet365 - $50 - 250 raked hands + rake back

Crypto Sites
Caribbean Sun - $50 first deposit bonus after 250 raked hands + $40 monthly bonus after 500 dealt ($90 after 500 dealt hands) + either a rake back deal or entry to satellite for wsop
Interpoker - $100 monthly - 800 raked hands + rake back
Poker Plex - $50 monthly - 300 dealt + rake back
William Hill - 5 UK Sterlings an hour - up to 25 UK Sterlings monthly + rake back
UK Bet/Total Bet - Same as above but requires money to be set in UK funds instead of USD
Ritz Club - Same as above - for non US residents though
Classic Poker - $100 dollar sign up bonus - 500 raked hands -> no monthly bonuses

IPoker
Noble - $500 deposit bonus + $50 from talking poker
CD Poker - Free Poker Tracker/KEM cards + $100 (10x -> 1000 dealt hands)

Others
Paradise Poker - $50 cash instant + $50 bonus -> 500 raked hands over 0.25
Pacific Poker - $60 cash instant + upto $100 from site (rather difficult to clear)
Absolute Poker - $90 worth in gift certificates (expires Apr 30) or rakeback that doesn't take away from MGR. (Inital Deposit Bonus from Absolute is useless - can get it every week)
Sports Bet - $100 (site says it must be at 1/2 or higher - not true - cleared it at 0.25/0.50) -> 500 contributed rake (every flop you see = raked) + $60 gift certificate