There are other, more advanced, more elaborate USB phones out there, but how are you going to beat this price? Compatible with Skype, voice-ready messaging clients, VoIP and other services. Check other system compatibility specs on the seller's site (below).
Through December 31, you can have this VoIP phone, basic but reliable, just for $2 shipping. Use the promo code SHIP4LESS to get the shipping deal and mail in the rebate to get your $40 back after purchase. You can thank me later.