The displaylink website said that it might be a little sketchy as they were still working on some bugs.  However, I downloaded the beta version of the latest software and so far it works.  The PQ isn't as good as plugging directly in, but I'll mostly be doing e-mail and document editing on the third monitor that will get plugged into that so I don't think it will bother me. 
The Asus gets here Monday and the Amazon employee I talked to last night said that the dual Ergotron display mount I was looking at might be back in stock next week and possibly on a Holiday deal as well.  I won't hold my breathe, but that would be pretty sweet if his information was correct.