Try the virtual mouse, and see how system access handles web pages.  You 
can't do scripting, or make windows, but in most aplications you don't need 
to either.  It works great with skype, echolink, winamp, and goldwave.  It 
also shuts up when k1000 loads.  Haven't tried other self voicing 
aplications.  Besides that, you can load system access, unload it, and leave 
no trace behind in modifying the video chain.  It's cleanly out of there.  I 
have also been pleased with it's performance with IE and Firefox.  Try 
filling out a form, and not having to enter forms mode, or do anything but 
type in a field.  You can get used to that, and having a page load and start 
reading at or near the text, rather than at the top of every page.
See how long it takes for you to like that feature.