I’ve got the Magic Jack installed on the Thin Client, works perfectly so far. The only annoyance I can see is that you need to include the area code for all outgoing calls, even if they are local to you. I purchased mine at Radio Shack, so I could also obtain the 1 yr replacement guarantee (about $5.00 US) just top keep it hassle free.
From what I can see so far, this is a keeper. If you are thinking of using a Thin Client (a striped down solid state PC about the size of a router, flash memory, no hard-drive, no moving parts or fans, and eats less then a nightlight worth of power), I suggest you obtain a Magic Jack ready unit off of eBay. Mine was not MJ ready so I had to do some configuring, and add some drivers. I suggest you pay a little more and get one that is MJ ready. For a MJ ready Thin Client install, all you need is a monitor, keyboard, and mouse for the initial install and registration, then you can disconnect all that and it’s a little box sits in the corner, stays on 24/7, and never gets hot. One more advantage of going with a Thin Client, and this is a big one, part of the reason the MJ is cheap is because they monitor your Web activities and sell that info to third parties (read advertisers). However, if you dedicate a machine to MJ use only, then they get no info from the spyware they install.
I hope that helps.
Freeman