Canon Digital Pocket Cameras

I read a review that said "If you're mostly shooting still images then I'd suggest a high speed 1GB card as a good starter size. If you're doing lots of 720p movies then I would go for something like a 4GB SDHC card."

Would this work with the camera "SanDisk 4 GB Extreme III SDHC Card with MicroMate USB 2.0 Reader (SDSDRX3-4096-A21, Retail Package)"?

I would expect so. The 720p video will use up memory very quickly. I'd suggest purchasing a second card as prices fall. Download to computer frequently to free up card space and safeguard your work.

Check this site:
http://powershot-tx1.blogspot.com/2007/05/update-on-flash-card-performance-on-tx1.html

and this one:

http://powershot-tx1.blogspot.com/2007/04/canon-powershot-tx1-faq.html

Cheers!