No hint on the costs of connecting to the regular phone system then. My business has used open-source VoIP since 2005 and since then never paid more than 1p per minute anywhere in the world and usually considerably less and has had the benefit of local point of presences.
When Office 365 was originally launched it offered connections to the telephone system. I was staggered to find that as a UK business the only options offered were the likes of BT at 10p per minute. Extortionate pricing and only a UK point of presence. What a disaster.
So with these credentials and given the list of 'partners' listed in the article I have little confidence that Microsoft has upped its game. My expectation is that Microsoft and partners like BT will want to turn the clock back to a time when phone calls were outrageously expensive and inflexible. Microsoft has to recover the $8.5bn it paid for Skype some how.