Yahoo has launched the beta for its SIP-based Yahoo! Messenger for Voice VOIP Service in the US. The service features phone-in ($2.99 a month, or $29.90 a year) and phone-out capabilities to allow users to make and receive calls from landlines. Pricing for calling out is apparently very aggressive – 20-30% below Skype – USD 2 cents a minute or less to the top 30 national phone markets.
See Yahoo Voice.