I wouldn't waste your time or money on the B2K.
I've had nothing but problems with the B2K adapter on Mac OS X, and their support has been less than supportive (their choicest suggestion to date was to switch to Windows). I've finally thrown in the towel on the device, and am now testing the
Tradetouch SkypeKey. It doesn't have the Skype/POTS switching capability of the B2K, but then again what good is that feature when the B2K doesn't work to begin with? Thus far, the SkypeKey works, other than the fact that it forces you to either use a quick-dial setting or dial an entire number (00+country+number+#)--even if you have Skype set with a default country code, the
SkyATA software doesn't care. I've notified their support about this, and am awaiting a response--we'll see if they're more on-the-ball than the B2K folks. Other than that, though, the SkypeKey works--it has yet to fail to give a dialtone, which the B2K failed to do on a regular basis.
I have the SkypeKey hooked to a two-line 5.8GHz cordless phone system...I get POTS dialtone on line 1, and SkypeKey dialtone on line 2. Works like a champ.
UPDATE: There appears to be a conflict between the SkypeKey device and Mac OS X 10.4.9. If you are using a SkypeKey,
do not update to 10.4.9!