Service Pack 2 for Windows SharePoint Server is out now, and the main things it does is do a lot more with configuring IIS with WSS, support for SQL Server 2005 and ASP.NET 2.0, as well as adding support for Firefox.

My fellow MVP Bill Simser has done such a good job of documenting this, I'll just link to his excellent blog, thanks Bill!

However, if you're running SPS, not just WSS, some of the IIS stuff won't work untill SP2 for SPS ships, so, look out for that.