Now that there are 10MB (aka 66x), 20MBps (aka 133x) and even 22MBps (aka 150x) cards, its a challenge to figure out what to buy.
Core Sound — PDAudio® System has done some benchmarking, but most folks don’t do reviews of SD cards. There is also an issue with older cameras since anything bigger than 1GB requires a FAT-32 format so you can only see the first 1GB. Also, the really no-name cards like (“A-Data”:http://www.pricegrabber.com/rating_getprodrev.php/masterid=12217348/id_type=masterid have just terrible reliability and user reviews).
Some pretty good 4GB choices are:
* “Patriot Extreme Performance 133x 4GB”:http://www.pricegrabber.com/p__Patriot_Memory_Extreme_Performance_133x_4GB_Secure_Digital_Card,__19252986. Patriot has a good name in system memory
* “Transcend 4GB 150x”:http://www.pricegrabber.com/p__Transcend_4GB_Secure_Digital_Card,__12024819. This has a $30 rebate on zipzoomfly.com right now.