Yes, we do support ASP.net Beta 2 Hosting and if you like this to be enabled for your website, please create a support ticket.
Each individual website need to be setup to have ASP.net Beta 2 support.
Please note that,we recommend you to have one fresh development or test website to be setup as ASP.net beta 2,as there might be bugs and ASP.net 2 is not yet ready for Production release.