Steve Sanderson is apparently writing two Apress books on ASP.NET MVC. While doing so, he’s been digging deep into the framework and inventing/discovering some pretty amazing things. My favorites thus far are:
Partial Requests in ASP.NET MVC
Partial Output Caching in ASP.NET MVC
I’m yet to use it seriously, but I’m pretty sure this is a big part of what I’ve been looking for when it comes to components in MVC. Definitely going to keep an eye on his blog.