Here is where I got my 2 8GB SD cards.

I partitioned 2GB for FAT32 and the rest for FAT16.

All works fine, no problem whatsoever. I have done this several times (literally several times, reformat, repartition, reflash and so on). I have also tried both pre- and post- SDHC patch. The pre-SDHC patch did a little weird thing for me, at some point (after I installed and uninstalled a bunch of apps, I couldn't install and/or uninstall anything when I boot from the Ext2 ), hence I patched and re-flashed and did the whole dual boot thing all over again.

Works fine now, except that I notice a little "loss" on the capacity of the card (it says 5GB + 2 GB on my MMC2 now)

Hope that helps