I'm also on the other end of this problem. I am what my co-worker refers to as a "Code Whore". I haven't been officially trained in any language (unless you count one semester of ADA which didn't get much further than Hello world). I have however contributed on projects (and even lead some) which involved anything from C programming on in a 16-bit DOS environment to C# and everything in between(I still use perl for anything I can get away with). Due to this patchwork background, I feel that I would have a hard time finding a new position. At my present employer, I see new graduates getting hired at much greater pay than myself but essentially doing the same job.
I know that I could do most of the jobs I see in the market and do them well but I don't have a classic resume to back it up. This can get very frustrating. Just my two cents worth.
Jack-of-all-Languages, Master of none.