Using SDHC in CF cameras

I'm noticing that SDHC memory seems to be quite a bit cheaper than CF.

I'm wondering about the possibility of using a SDHC card like the 16Gb Sandisk Ultra II in my Canon 5D with some sort of a card adapter...

This card is around $90 and the same capacity Extreme III CF card is $150 and I'm contemplating buying a dozen cards so the difference is price is significant.

I've heard of some people using these adaptors for the eye-fi wifi SD cards with some success, however, you may need to be careful about what transfer speeds and densities are supported. When I looked into this idea about a year ago I found some would not support full data rates and many could only go up to 4GB cards.

I agree I think it's a neat idea, but Ultra II cards aren't nearly as fast as the UDMA cards that are available now.

Cheers

James