I have quite a few Special sign-up offers on my site at the moment, these are just some of them:

Go Wild Casino (Microgaming - no USA)
50 free-spins on ThunderStruck II. Value = 30p/spin.
Standard SUB: 100% up to €/£200 with WR B x 29 (3rd best MG SUB on the net).

Golden Cherry (Brand new Rival casino - USA OK, but no Canada)
100% up to $/€/£500, WR (D+B)x20, Cashable.

Win Palace (RTG casino - nearly all countries accepted)
100% up to $1,000, WR (D+B)x25, Slots only, CASHABLE!
Go to the cashier & redeem coupon: KKSLOTS

SlotoCash (Rival casino - USA OK, but no Canada)
$26 Free-chip, no deposit. (Available for $US accounts ONLY!)
WR Bx25, Slots only, Cash-out min $26, max $150.

Star Games (Novomatic software - no USA)
€5 free, no deposit. (First 10 players only!)
Wagering a crazy-low bonus x 1, no maximum cash-out.
Win or lose with the above, you can also claim the €100 deposit bonus with the same low wagering!
Please click here for full T&C’s.

Other new casino bonuses you might not be aware of:

Go Fish Casino (Brand new Rival casino - USA OK, but no Canada)
1st SUB: 177% up to $/€/£3,450! WR (D+B)x9.39 Slots (no progressives) & Keno only, Cashable
Min withdrawal; Bonus x2, Max; Bonus x3
They also offer a $/€/£377 no deposit, free-play for 60 minutes chip with reasonable WR.

Treasure Mile Casino (BetOnSoft - USA accepted)
100% up to £/€/$1,000. WR (D+B)x20, CASHABLE! Minimum cash-out = $100.
All games contribute towards the WR as follows:
100%: All Slots & Keno, 50%: Roulette & 3-Card Poker, 25%: Baccarat, 10%: Video Poker, 5%: Blackjack & Craps.
Also, new players get 10 credits worth of free spins on any of their slots with NO DEPOSIT required.

All bonuses are for new, first time customers ONLY.
In accordance with the terms of this section, these offers are not endorsed by TGT. Any questions or problems should be addressed directly to me.
It is very hard for me to make sure these offers are still current, as the casinos can withdraw or change them at any time. So sorry if any info is incorrect!