I have the latest MBP and mine is 420mb, downloading now.
I hope this fixes the spaces bug with photoshop, the wake from sleep bug, a bug I just had yesterday when it decided to stop recognizing my Apple keyboard, my bluetooth problem where it locks up and doesn't let me turn it off when the mouse drops, the "F" key problem I have with finder not letting me rename files with "F" in them, the garbled graphics error where finder and cover flow looks like its melting, and what else am I missing? I'm new to macs as a regularly used home computer and am having lots of problems, but I still love it. Just hope some of these problems were fixed. Also hoping they will throw in some more multitouch tastiness as a bonus!