David emailed me about BestBuy having a Sandisk 8GB Ultra II on sale for $49.99. I dropped by this afternoon and picked one up.
I find that the Ultra II is fast enough for my needs. What I need mostly is a week's worth of storage as I shoot about 150 pictures a day (typically three or more of each scene) and only have time during the weekend to look thorough them carefully and decied what to keep.
I think the Extreme III is likely useful for those that need to shoot 6fps continuously.
I also got a couple of good desktop background photos from the candy section, while I was shopping for groceries at the local Metro (aka. Dominion). Photos forthcoming if they turned out well.
Jim also mentioned that Henrys has $50 off the 50D body which means I might be able to get $50 back since they have the Price Gurantee. Update Thu Nov 13 12:06:03 2008: I Dropped by Henrys this morning and got a $56.08 credit on my card. Essentially, I got a free 8GB CF card out of all these deals.