i use my lap-tops wireless (802.11g) to connect AD HOC to my huge beastie computer that has a wireless dongle plugged into USB. PLUS, my USB ports are a PCI attachment to the motherboard because for some reason the motherboard USB ports don't work. My huge beastly computer is then attached to Woosh residential gateway via PCI Ethernet, which in turn hooks up to the modem and the phone.
despite the complexity of this arrangement, SKYPE works fine on my lap top. I am annoyed by call disconnects every now and again but it usually only happens when been in a call for a long time. if it is due to Woosh signal strength I would not surprise, it is radio after all.