Looks like I was mistaken. I was reading the Euro manual. SDHC is supported in the US version. Sweet!! Even if only 8gb is true that is still way better than only 2 gb.
So I was reading the manual for the 900BT and it says it DOES NOT support SDHC. This is a big downer cuz it means it will only accept SD cards up to 2gb only. I would also have to assume that the premier 90bt does not support SDHC either.