For those unsure of the way Johnny V's (great post, btw) uninstall of the getPlus(R) and you're running Windows, you can uninstall it this way:
1. Go to Start > Control Panel > Add or Remove Programs
2. Choose the "getPlus(R)" from the list
3. Click "Remove"
That will remove it from your system and should remove most of the extra files laying around on your system (aka I couldn't find them in the Registry after that).
For Marcus Brewer - try running Windows in Safe Mode, and then uninstalling them, or make sure they're not open in some way, shape, or form, if you're not sure how to get into Safe Mode. If they're not uninstalling, try to reinstall Adobe Reader on top of it, then uninstall - the files may be corrupt.
And btw, to graffiti's post, Acrobat does still exist - it's up to version 9, same as the Reader - they have Standard, Pro, and Pro Extended - how else do you think people still create PDF's who don't have access to older versions of Acrobat(besides going to a different PDF software, at least...)?
If you just need to VIEW a PDF, download Adobe Reader 9.0 (as of this post, at least) - there's a button to it on the front of Adobe's website. If you need to EDIT a PDF, then you're SOL, unless you wish to dish out the money for it ($299 for Standard version). Most people will not need to edit a PDF, and if it's a PDF setup as a Form, most of the time, the creator will have set up the PDF to have Text Boxes that you can fill out, though they may have other permissions set on it where you can only do certain things with it when finished. But even if this is the case, you still only need the READER.