I haven't ever heard of something that was specifically designed for wireless amplification of a regular acoustic guitar, but here are a couple things that could be used in conjunction with a wireless system (that is, a system with a small transmitter that plugs into the guitar output and a receiver that plugs into the amp):

Something I actually had for a while was a little microphone (i forget what type of mike) that attached to the body of your acoustic by means of a silly putty type substance. The mike had an XLR jack, which means that you needed to plug the mike into something that could amplify it using phantom power. It worked very well, and you could move the mike anywhere on the body of the guitar to get different tones.

Another possibility is the Fishman Powerbridge, which goes underneath the string saddle of your acoustic (the white piece of plastic where the strings rest near the sound hole). These apparently sound really good (actually, if I remember correctly, Jon actually was plugging these a while back).

Then again, like Jon said, I'd wait until I had a few more lessons under my belt before I went and bought more equipment - that way you know how serious you really are, what sound you're looking for, whether you need equipment loud enough for gigs, or just in the bedroom, etc.