Great news for umbracians without MSDN subscriptions. With SP1 for Visual Studio, the free edition for web development called Visual Web Developer Express will get support for Web Application Projects.
This means full support for all the .NET features that umbraco can consume - for free. So finally joys like ActionHandlers, XSLT Extensions and Custom/User Controls can become for everyone which is really, really fantastic news.
There's already a beta of SP1 out there for any daring takers. Kudos to Microsoft for releasing this!