Purple Lounge have 100% bonuses, and other than for Neteller & Moneybookers, WR has halved to 25xB (from 50xB).
They do, curiously, lock accounts (after paying out) rather than merely "bonus ban" players. This was discussed in a different thread, and there seem to be no "rules" a player can stick to in order to not get their account locked. It seems to be down to whether they like your style, rather than any overt acts of "bonus abuse". They do NOT ban players merely for winning (this is what the rep said), and to support this claim, I have surged 25K ahead there, and have NOT been banned (yet
). Other players seem to have been banned despite LOSING.
The rest of the stable do NOT offer 100% bonuses, but lower percentages (other than sign-up bonuses). VIP players MAY get the odd 100% bonus.
Palace Group have weekend promotions, and occasionally a 100% bonus will be offered, although more often the range is 25% to 50%. Winning earns a bonus ban (I won, and I am bonus banned at ALL their sites now, even the one I am 10K DOWN at).
The impending UIGEA may further cut the bonuses on offer, and the next year could be very lean for players.