While Instant Messaging tools like Windows Messenger and ICQ have always had this ability, Yahoo has always had the best quality, least NAT related issues. Now, in working with BT in the UK it seems Yahoo, which also has VoIP with Yahoo BB in Japan, is taking the concept a step further.
What this means is Messenger, with its message center capability will tell you when you have a call, just like it advises you when you have an email. My guess is that you will have a store and forward like service built in so a call that goes unanswered goes to voice mail, and the message ends up in your inbox.Well, I hope it does.