A couple of questions about the Olympus E-PL1

Alright, howdy guiz. I've been looking into getting a Micro 4/3's camera now for a while. The reason being, I'd like to get into photography, but mostly just as like a side hobby. (computer building and tinkering take up most of my hobbying already) So I was thinking about getting this: http://www.amazon.com/OLYMPUS-262855-Megapixel-Camera-camera/dp/B0037VVWBK/ref=sr_1_2?ie=UTF8&qid=1340462103&sr=8-2&keywords=olympus+pen+e-pl1

It seems like a great deal, aside from the fact that it has no lens. So being that I'm completely oblivious to this stuff as it stands, how do I go about getting new lenses? I've tried researching it, and I know it takes Micro 4/3's lenses. But where can I buy them from? And decently cheap, because I don't want to dump a whole lot of money into photography right off the bat. Later on I want to get a Nikon DSLR, so this Olympus is just for learning really.

Thank you for the help, and I apologize if this is a stupid question.