Hi All, Up till now all the gadgets I've owned have used SD/SDHC cards so I'm very familiar with them. I know what to look for when I want a nice, fast card. I'm planning on purchasing a 7D next month, and it occurred to me I'm clueless about CF cards. I'd like to get one that's fast enough to capture 720p, maybe 1080p, but more importantly fast enough to suck up all those 8fps continuous shots. Anyone know of a good primer/guide that will tell me what UDMA vs 60MB/s vs 300x means? Thanks!