[Mono-list] Apache + XSP | What might be missing?

[met at uberstats.com]

I'm wondering what features (if any) might be missing by combining XSP & Apache
together to host ASP.NET on non-Windows environments? Are there any features
that simply cannot be performed within pure ASP.NET as a result of not being on
Windows?

I'm asking because the company I work for is looking to use Mono/.NET instead of
Java and I'm trying to eliminate the concerns as they arise.

Thanks in advance,

~ Matthew