Ian Bell’s commentary about SIP being Skype’s savior (or not) is worth a read, especially on a lazy Sunday like today.
Worth checking out if you want something cheaper than Skype comes from a San Diego company that was started by my neighbor and his sons. TelCentris operates VoxOx, and they just announced some new pricing. Their updated VoxOx client also came out recently and reports are that the new version cleans up a lot of bugs.