I'd imagine so since if you've got 2 Macs with airport cards (and no airport base) you can send files between them.
You need to enable Personal File Sharing and (making a note of your computer's name) use Finder to 'Connect' to that computer.Depending on what files you're sharing, you might have to turn on Sharing within that application's Preferences as well.
There may be an easier way to do it - I've only had to use it a couple of times.