I just started using SoftwareForMe.com product: PhoneMyPC
Not only does it do what I want (most of GoToMyPC capability at a fraction of the cost), but it's compatible with GoToMyPC (GoToMeeting, etc).
This means you can be in one place, your PC another, a user at a PC in a third place, and you can get the user onto your pc, and run the demo / presentation from your Droid.
The intro price of $9.99 - for 3 PC's (which can be switched as many times as you like) - is more that a bargain.
Pinch zoom makes you forget about the screen size differences.
Switching between screens (my pc has 3) is fast & easy.
I'm still learning all it can do, but this is a MUST have program.