I was looking for a new 4gb SD card and I'm coming across a few (now that I know to watch out for SDHC ). Most of the ones I'm sure about say 45x speed. There are some Transcend 150x SD cards, and they don't show SDHC on them, so it looks like I'm in business. But I'm kinda gun-shy now. Can anyone tell me if the card being high-speed would affect whether or not it would work in Palm TX?