The attention that MCI has gotten from its expanded hotspot network is bewildering to me: I cover the industry obsessively, and so I know that MCI is just reselling locations available from Boingo and Wayport. Still, there have been piles of articles trying to articulate how MCI's hotspot plan fits into their rest of their operations. There's a strategic goal there, of course, but the articles--not the one linked to, however--often confuse the private-label reseller relationship that Boingo has with MCI (and with Earthlink, Fiberlink, and other companies without -link in their names) and Wayport with, well, everyone, with MCI building out a hotspot network a la SBC or T-Mobile.
Although the IDG story linked to says that the service costs $40 per month for unlimited Wi-Fi/broadband when added to a dial-up and VPN account, it's unclear exactly how that works as MCI's Remote Broadband Access FAQ states that wireless charges are in addition to dial-up charges. Just another way in which it's hard to figure out what, precisely, something costs.