Depending on how much you're transferring, and if both Macs have an Airport card, you could just log in to one and transfer stuff to the other. That's what I do when i need to get stuff to Mum's iBook quickly.
To do that you just have to turn Personal File Sharing on on the Mac you're transferring from. Then go to Go in the Finder, choose 'Connect to server' and type in the name.local of the first Mac (you can see this name in the sharing pref panel when you turn on Personal File Sharing).
Log into the sharing Mac and off you go, you can transfer what you need.