I just got the SD300, and I'm using it with a 128MB SanDisk card that I'm sure doesn't qualify as "fast". However, it seems plenty fast for me, and it seems to write to the card about an order of magnitude faster than my old Olympus wrote to its SmartMedia card.

So, I'm pleased with a standard card, but I'm probably not a good source for information since my perspective is a little skewed by my previous camera.

I love the SD300, though, by the way.