I agree and dis-agree with this post. I agree that it looks awesome. I also agree that the AF (if you don't know how to use it) sucks.
But .... And this is a huge
If you take the time to learn how to use an X100 and learn it's fall backs (The slow AF -- Not bad AF .. Just slow) -- It's a fantastic camera in the right hands. If you're used to a DSLR AF system, the X100 AF is slow and it does take some getting used to. But if you manually focus (Which is fast) or simply learn to use the AF like a point and shoot camera, this thing is golden.
I disagree with who-ever said that it battles the 5DMKII in noise. It doesn't. It comes close but it's still way off in relation to the QUALITY of noise and most importantly, the detail you lose.
As for the buffer -- I agree with that. It does take forever to read / write onto SDHC and it's annoying. But then again, this is a point and shoot. It's not like you need 8 FPS with a huge cache. You aren't going to be covering sports or weddings or some ****. For a point and shoot, this thing is fantastic when used right and used for WHAT it is -- Just an every day camera that takes awesome frames of every day things. When you start expecting it to be a DSLR, it falls horrendously short.
Figure out what you need it for. Then give it a go. It's only like, $1200.00 at the moment and I've seen some AMAZING images taken with it.