I have a rediculously low amount of understanding about drivers, but here is an idea to solve this problem:

Find another phone with a microsdhc driver (Mogul, anyone?) and copy its microsdhc driver. The only question is whether they use different microsd slots. Someone could research to see the BOM, probibly created when some website, such as Engadget Mobile, dissassembles the phones, and figure out which, if any phone, shares the microSD hardware (exact).

When I called verizon they transfered me to samsung. Samsung stated that there were actual problems with the phone hardware, limiting stable usage of the phone's microSD card to 1 gig. This might be the reason why they didn't develop SDHC drivers. There was a problem with the microSD slot hardware.

I will repeat that I have no clue about drivers. Please, anyone correct me.