I saw myself pretty much in the same hole as you do now. I worked for a couple of years as an SAP developer but then got bored with the ABAP stuff. Luckily, I had the chance to do a lateral move within the same company and coded in Java from then on. Finally, I left the whole SAP field and now develop industry automation applications for a mid-range company (another hole, but that's a different story.)
What I want to say is, yes, you can get out of that hole. Of course, you will come across recruiters who will label you as the SAP guy. But there are others out there who know that there's more to it than just the programming language. So take the advice given in all the comments here, create something in your favorite technology and apply for the jobs that really interest you.