Travel Technology - Dock-N-Talk, any experience with this?

Does anyone have any experience with Dock-N-Talk from Phone Labs (www.phonelabs.com). It appears that if I get this unit, plus the blue tooth module for it, I can dock my T-Mobile Curve to it and hook up my wireless phone base station and use it to make calls over my cell.

This technology has been around for years, although for only specific phones. The only difference is that this one is universal. VOIP is cheaper, though, unless you don't have high speed internet access already.

*Not true if you have one of those new unlimited cell plans!