Anyone running the Windows 7 RTM?
 

Looks like it's already been cracked. No activation required.
Running the X64 version here, loving it.

How's it working in terms of updates?

And won't it eventually get de-activated?

Never pirated anything after XP. Also have never paid for an OS though.

Well, the windows updates are working, but it will always be that cat and mouse game with MS and the crackers. It's all good for now, and even if MS patches it, there will be another crack.
For compatibility, I dual boot anyway, XP on one partition, Windows 7 on the other. I can use the XP install to access the 7 install to recrack if MS ever puts 7 into lockdown via Windowsupdate.

I read that it will get de-activated after a certain number of days. I think I'll just wait for a while before I permanently switch over but I would like to try it in the mean time.

We'll see.