A trojan for Skype

Has anyone tried Gizmo's SIP-to-Skype gateway? That claims to allow one to use a SIP Hard/Softphone (assuming it can be made it work :-( ) - and still talk to friends on Skype.

Of course,
1) this turns free calls into paid-for ones (Gizmo charge)
2) Doesn't help with the problems with Ekiga/sound/etc

But it does prove that a gateway is possible.

(Unfortunately the FreeSwitch (and Asterisk?) Skype integration works by talking to a local Skype client, so doesn't really help with the privacy issues.)

Martin