MCI corporate access customers will have access to Wayport's network: In a natural extension, customers who use MCI for corporate remote access will be able to use the same account for Wayport hot spots.
Interestingly, what iPass mentioned to me in this regard -- and a model followed by GRIC as well -- is that corporations want to set up their own accounts on their own networks and have aggregators and partners authenticate via the corporate system. If I set up "jimjohn" at corporate HQ, when "jimjohn" is on the road with iPass, they log in as "jimjohn" and iPass passes through the authentication (combined with new cool one-time user mixing that happens on the backend) via the local ISP/wISP partner all the way through to the enterprise via hardware or software that iPass has on site.
Corporate customers don't just want accounts: they want integrated, single sign-on authentication using existing systems coupled with detailed billing that can be used to track expenses. That's why the MCI and AT&T tie-ins are naturals for iPass and GRIC but not so much Boingo and Wayport, which run their own authentication system -- at least as far as I know.