There’s a brief news item in getdotgnu.com on how to get ASP.NET working on DotGNU Portable.net .
ASP.NET forms and Sessions also seem to be working fine. This also works on an Ipaq handhelds as well – like PocketASP did. The Amiga port is also underway. This should also work on OpenBSD (after turning off stack protectors in gcc for GC support).