I'm having more troubles than that.
When I tried downloading it, the 'connecting to server' dialog popped up and stayed up. The Finder immediately went spinning-beachball-of-death on me, so I couldn't click on cancel. Safari froze the same way next. I couldn't switch apps by the dock or command-tab, couldn't cmd-opt-esc quit anything either (though F12 did still eject the CD tray, isn't that nice?).
I could still switch apps by clicking on windows, and I could move the frozen app windows around, so I could still switch to apps that had open windows. I had a terminal window open, so I tried to run 'top -u' to see what was going on, but the command wouldn't launch - the terminal window was the next thing to go beachball.
At that point I got fed up and applied the power switch of doom to the whole computer.
Here's an entry from my system log, which might be a hint of something going seriously pear-shaped:
Aug 6 10:48:10 localhost kernel: nfs server
ftp://75346414@imercury1.apple.com/Developer_Tools/xcode_v1.5/segments/: not responding
NFS? That's not supposed to be happening! So, I'll wait a while for xcode...