dont know if you thought about or yet tested it ... ngen could help you with precompiling your website ...
Edit: wow, there are a lot of Ressources for .NET Performance ... a realy interesting job to evaluate all these
Checklist: ASP.NET Performance
Improving .NET Application Performance and Scalability
Edit2: some more to ngen ... NGen Revs Up Your Performance with Powerful New Features ... ok, it a dotnet 2.0 article ... but should basically apply to dotnet 1.1, too