haha.
you know what this means, right?
MORE KEGS!
seriously though, slowly get more and more if you can. there are ebay sellers selling kegs in good condition for four for 80 shipped, which is a good deal. just get new seals on them, and they should be good to go. you may also want to build a larger kegerator in the future. what i've done is converted a full size top/bottom fridge that can hold 6 kegs inside.
it is understandable if you have space constraints though, work with what you have, but i'm sure you could stow away extra kegs here and there, in a closet, hallway, bedroom, garage, etc.
it can be sorta like an easter egg hunt when you blow through a keg, and the first keg you find is what you put on tap. haha.
also, look on craigslist. at least for where i am at, there are postings every now and then for kegging equipment, generally for an excellent deal. i recently bought 8 kegs for 5 a piece because the guy was moving to florida (i live in texas), and the kegs were in excellent condition. keep your eyes open for good deals!