I've had IE7 installed at home for quite some time now, but only in a domain environment the past 5 months or so (workstation and server side), due to some compatibility issues.
The great thing about IE7 is that it's now easy to install silently, as it no longer requires Windows to be activated. Very useful and automates my standalone patching process further when building new machines etc... I've successfully managed to silently install everything to date in one package - all XP SP2 updates, .NET 1.1, 2.0 and 3.0, Media Player 11, Terminal Services 6.0 and now IE7. It weighs in at 335MB.
We should get used to deploying new browsers in the future, as apparently Microsoft are working on IE8 and IE9. Be interesting to see whether Microsoft abandons XP with IE8 however!
@ZeroHour - Are Microsoft planning to integrate IE7 into XP SP3? I was under the impression that wasn't going to happen. XP SP3 appears to be more of a very large update rollup with some elements of Vista.