My friend Rob Bagby has done an excellent job putting together a series of primers on REST with WCF.
REST is gaining more and more attention recently as a great way to expose services over HTTP that do not require WS-* features. I think if you spend some time with REST, you will not only learn an alternate way of working with services, but you will also learn or re-learn the fundamentals of the HTTP protocol, which will be helpful regardless of what approach you take to building Web Services.
Rob's blog series can be found below:
Rob has also put together a series of screen casts on the subject which can be viewed here:
endpoint.tv - Controlling the URI in RESTful WCF with Rob Bagby deCast - Creating a HI-REST GET Service with WCF 3.5 deCast - Consuming a HI-REST GET Service From Silverlight 2 (Beta 2) endpoint.tv - Caching and Conditional Get with Rob Bagby
To catch up with Rob, be sure to check out his upcoming live events here: http://blogs.msdn.com/bags