As someone who's currently an experienced .net developer (based in NE Ohio), prefers working for smaller companies, and is getting the urge to look around and s

As someone who's currently an experienced .net developer (based in NE Ohio), prefers working for smaller companies, and is getting the urge to look around and see what opportunities are out there, I have a question I'd like everyone's input on: is staying mostly .net-focused a viable idea, or am I taking on a serious career risk? I've worked with python and ruby a bit and am currently working my way through Programming Clojure, but right now I'm much more experienced with .net and it's where my comfort zone is. I try to keep abreast of what's happening elsewhere, but don't have as much time as I'd always like to try other technologies. I'm curious what people think - am I better off pushing harder on new stuff and hitting meetups, or is C#/MVC still a viable option despite Microsoft's current struggles? (Not that they're on the verge of disappearing or anything, but they definitely don't have the buzz in their favor right now...)