TopRankedPoker (on the B2B network) just changed their signup bonus to a pretty juicy 5x bonus. It's a 100% up to 600 euro signup bonus (deposit $750 if you're in the US), with 30 days to clear it, paying out 20 euros for every 100 VIP points you accumulate. The bonus code is SIGNUP600.
You can also get an extra 25 euro referral bonus. Use referral name "scurvyTOP" when creating an account, then use the above bonus code when you make your first deposit. If you try to use both when cretaing an account, it won't work. Use referral when creating, bonus code when depositing. You'll get the 25 euro referral bonus after clearing 200 VIP points, then the signup bonus will be paid out 30 days after creation of your account, based on how many VIPs you accumulated.
They're also giving away 2 decks of BEE cards for anyone who signs up right now. Create an account, deposit, and "...send a mail to email@example.com, with your user name, name and adress, and we will send you the decks the same day."
On top of all that, the site is part of the B2B cashback program, that pays you a cash reward based on your play each month. If you accumulate 3001 VIPs in a month, you'll get an extra 50 euros back, on top of everything else, for your play. Note, though, that it's based on the calendar month, so if you split your play up over two months you might not get the full 50 euros, as they play less for lower levels of play.
These 5x bonuses on B2B sites usually don't last long, so you might want to hop on it while it's there, if you have any interest at all. If you clear the full 3001 VIPs in the same calendar month it ends up being a 675 euro bonus, plus two free decks of cards, which ain't bad at all.