.NET advice requested

The more you know, the better off you can be. It sounds like you have the core foundations done. You can do the job without things like WCF and LINQ. WPF though is still more a desktop feature, though Silverlight is closely related (and was actually originally named WPF/E for WPF everywhere). Pick the items that will help you expand your knowledge based on what projects you're currently in. One thing I would recommend, is learning to use the MS Patterns and Practices: Enterprise Library. (http://entlib.codeplex.com/) It's a great set of patterns and I use the Data part of it every single day. So, the short of it, yes, you know enough to get going. The long of it, always keep learning. There are lots of things you can learn and new ideas come out almost every day it seems. Pick your learning initially on what gives you the best bang for your buck via your current projects then you can expand outwards into things that may be good skillsets to have in the future.