[Brian]

Dennis, MobileMe does require you to authenticate - but it sounds like that solution doesn't work for acollins' purposes, since the data has to live on a work-approved hard drive.

If he's going to be setting up WebDAV on his laptop, either switching it on/off as needed or setting up some sort of authentication is going to be prudent.

(I'm pretty sure that WebDAV supports authentication - I just didn't think of that originally.)