Theoretically, it works for all Garmin GPS devices, at least according to Garmin's website. The easiest way to get the answer is to have the device connected to the computer and go to this page:
http://www8.garmin.com/products/communicator/test/
If the page says it detected the device, then it is supported. HOWEVER...
the main site may or may not support it. Each Garmin device puts out a slightly different version of the TCX file. Www's importer only handles a subset of them. Beta should be able to read all formats. If the device is detected by Garmin's test page but she's not able to import any workouts via www, then she should wait until I upload the latest changes, which I'm hoping will be in two weeks or so.