Mmm, before you start hanging from the ceiling here are a couple of other thoughts.
The track pads in these machines rely "capacitance coupling" to work out what is required of them. Various things can interfere with this process. Some are very simple - dirty fingers, a dirty trackpad, a powerful electrical device in close proximity (sticking your MBP next to the microwave probably isn't a good idea) , etc etc.
Others are maybe less obvious. Some people have found, for example, that the problem will occur only when using the mains adaptor, or only on battery, or only on the mains adaptor when using the two pin "duckhead plug" rather than the three pronged, and properly earthed, cord to attach it to the mains (the body of an MBP can actually carry a current itself at least in in some situations). Sometimes people find that by using an earthed cord AND earthing themselves (not wearing insulating shoes, for example) can affect it.
Jewellery is sometimes claimed to have an effect, too. Big chunky metal bracelets might not be good things to be wearing while surfing the net, but even rings and pendants have been implicated in some situations(though often the claims I've seen are anecdotal and not very clearly made)
A few people also indicate that a PRAM reset has fixed the problem for them.
http://reviews.cnet.com/8301-13727_7-10330102-263.html has some similar observations and suggestions
Others, however, have had to have the upper case and trackpad replaced under warranty to resolve the issue.
So don't give up and imagine you have to emulate a circus performer whenever you want to do a bit of typing! If the suggestions above don't resolve it, then take it in to Apple before your warranty runs out.
Cheers
Rod