First off, Apple's trackpad's work on a principal called, "coupling competence", very similar to a capactive touchscreen. I own a 13 inch late 2009 MacBook Pro and starting having major issues with the trackpad after about six months use. Hardware issues are not fun and can definately be a pain, but fortunately mine was in the software. I tried everything, cleaning it the trackpad, restarting the system, redoin system drivers and eventually I backed up my files and reinstalled Mac OS X. It worked fine after that. Restoring the system was definately annoying since I so many files on my computer but it did get my jumpy, eratic, and most of the time not responding trackpad to work. Another option is to get a wireless mouse or use your iPad, iPod touch, or iPhone as a substitue trackpad. There are several applications on the App store that are wonderful with it. Personally, I like AirMouse Pro but its whatever you prefer. Hope this helps... Also, if you are wondering if the issue is software or hardware, try booting off a live CD, such as Ubuntu or your Mac OS X restore disk. (Just hold down option on startup) If your trackpad is still acting up it is probably a hardware issue, however if it works okay I would advise to backup your files and reinstall OS X. Personally, I think something detrimental happened to the trackpad .kexts, but who knows...