If you're a fan of iPoker network sites like Noble, Titan, Bet365, you might check out the current signup bonus at Betfred.
The Betfred signup bonus is a 100% match, up to $250. It's a 10x raked hand bonus, so if you deposit $100 and get a $100 bonus, you have to be involved in 1000 raked hands before you receive the bonus. If you deposit $250, then it's 2,500 raked hands.
Note that it isn't contributed hands, though, simply raked hands, which speeds up clearance a bit. That said, it'll still take awhile to clear, but you have the advantage of playing on an iPoker site, which has some truly bad players in general on there.
Here's the text from the site, as far as details:
"To start you off, we're offering a fantastic 100% bonus on your first deposit at Betfred Poker, up to a maximum of $250! To earn your bonus, simply make your initial deposit, then play the required number of raked hands according to the table below. Once you have completed the requirements, email us at firstname.lastname@example.org to claim your bonus. Your bonus will then be credited to your account within 48 hours.
Please note: Only raked hands played at blinds of $0.25/$0.50 and above for pot limit / no limit, or stakes of $0.50/$1 or above for fixed limit will count towards your wagering requirements. A raked hand is where you are dealt cards in a real money cash game and the pot reaches a sufficient amount to be raked (see our rake structure here). You do not necessarily have to put any money in the pot for the hand to contribute towards your raked hand count. Tournament hands are not raked so only cash game play counts towards wagering requirements.
For every $1 in bonus money you need to play 10 raked hands, therefore to earn a maximum bonus of $250, a player must deposit at least $250 and play 2500 raked hands. The table below shows the corresponding number of raked hands depending on the initial deposit.
Deposit amount Bonus Raked Hands *
$25 $25 250
$50 $50 500
$100 $100 1000
$250 $250 2500
* raked hands required to receive total bonus award.
This bonus is subject to the general terms and conditions of Betfred Poker. Players can find out how many raked hands they have played by contacting our 24 hour poker support team on the 'Live Help' option from the poker lobby."