As my primary hobby development in .NET and gaming, I'm always on the lookout for something that makes the development easier. One such thing I've been checking out a bit is Tray Games. It's basically a platform and delivery method for small .NET games. They provide the API for doing client server development and host the games. It's still very early in development, but if you're into .NET game development and are looking for a way to get your games out there and tools to make your games multiplayer, take a look at it. The more developers that get on board the more likely it is to make a decent splash in the indie game development world. I currently have two games that I'm thinking about hooking into this so I'll probably have more posts related to what it's like to develop for it.
On another front, I've been doing mostly ASP.NET development at work and I started looking around for tools to make that easier. I'm in the process of evaluation the DotNetNuke framework. It's an open source module driven framework meant mainly for commercial sites, but I don't see why personal sites can't be done using it. They recently updated it to work with ASP.NET 2.0 and I've been trying to find the time to play around with it. The ASP.NET 1.1 version has a lot of modules already built for it, covering a lot of typical things one would see in websites, from blogs to survey tools, to message boards. It's pretty cool and if you're into web development I would suggest taking a look at it. There's a handful of companies that handle hosting sites developed with the framework, although I haven't had time to really look at them.