Eh, BB has a very liberal return policy. It's nowhere near twice the price: $199 @ BB for the A1100... ($159-$169 is normal) - for SX110, from BB, $249 (vs ~$229 online), so it's only $50 more staying with BB. Now, if you could get credit for yours and buy the 110 online, even with shipping charges... but we haven't even covered if you
want an SX110, it was just the first CHDK option that came to mind.
Assuming you do, they're going on sale everywhere...
zipzoomfly had 110s for $219 recently, but they're out of stock. Why? 'Cause the
SX120 has been released as of this week, and Canon will stop fulfilling orders of 110s... although for now, many of our favourite camera vendors still claim stock. But of course you don't want a 120, you'd be in the same boat as you are now. Decisions, decisions. :'(