This is one of the coolest things that comes from TechEd Europe: the SQL Server Web Data Administrator that ships with Visual Studio 2003 will be revisited to a complete new version for SQL Server 2005, written with ASP.NET 2.0 and (incredible!) open source.
The new version will have:
- Revamped UI
- Improved navigation
- Improved architecture to make adding new components easier
- Fully based on ASP.NET 2.0 and SMO
- Works now with SQL Server 2000 and SQL Server 2005
I've always loved this tools and seeing that it will be open source and easy customizable it's a pleasure! 
If you're curious how it looks like, take a look at http://microsoftsqltools.com/.
Michiel Wories corrects me... the new code name is "Mercury" and SQL Server Web Data