There once was a case to be made for microdrives in that they came in much larger capacities than did CF cards but this is no longer true. What *is* still true is that microdives are *much, much* more susceptible to damage than are CF cards. They contain moving parts (there really is a spinning hard drive in there) that can easily be damaged if dropped or subjected to excessive shock.
Sources for good prices now are everywhere. As digital cameras and other digital devices become more common, you can get CF cards at most any large store. Costco, that mecca of western shopping, caries a number of sizes at good prices for instance.
Hello, here is my two cents. I had two hitachi 2G byte (3k4 series) mirodirves, one 512 Sandisk extreme and one 512 Sanddisk UltraII.
For Speed, both the new 2G microdrive is comparable to these Extreme and UltraII, both only take around 45s to flush 7 frames of raws in continuous drive mode. Around 2M byte/s, I think these cards have more bandwidth than the camera can output, so don't think we need even faster card for it, eg the Ultra III card that will be available soon. I had also tried those 40X Lexar (with WA) which takes around a minute and for the Magicstor (2.2G HDD) it takes another 20s more. Magicstor is not recommended as the play back time is extremely long and the drive is not responsive.
I do agreed for reliability CF will be much better but at the time I bought the 512M Extreme card it cost $140 while the 2G Hitachi MD that I got also around the same price. If RAW is the prefer format that you will be using on the S2, 2G+ is probably what you may need (~160 photos). But recently with the price cut in CF. I can get a 1G UltraII at ~$100 here in Hong Kong. If I am going to choose again now, I will vote for the Solidstate CF too.
I recently purchased a Fuji S2-Pro I was given a form to fill out and a week later Fuji sent me a 2gig Hitachi Micro Drive, I did have a micro Drive go bad on me but the pics are recoverable, I also had a CF Card go bad and cannot format or recover anything Im am sending it back to Lexar today.