LogMeIn (free and subscription) For remote connection only, it's free and the way to go. Can't move files, but you can email them to yourself or upload them to another site.
I have the subscription version, and you
can move files, and even larger ones that you can e-mail.
I am not familiar with a lot of these products, so I don't know how LogMeIn compares here, but I love the "drag 'n' drop" ability with the subscription version: you can just pick up a file from work and drag it onto your home desktop. Too cool.
By the way, the "instant" version of LogMeIn (referred to above) is called Ignition. I purchased it (about $15) but haven't tested it yet.
