For instance, today I was alpha testing an app that the team I'm a part of is building. It wouldn't start up correctly, so one of the guys who's developing it, sauntered down to my office, played around with a few things on my system and answered definitively: "We need to put MSHTML into your GAC". [The Scobleizer Weblog]
Very interesting: Scoble evangelises Longhorn, its his job. The team is to do with Longhorn and the PDC, perhaps this alpha application is for that. Lets put 2+2 together and what do we get:
If he's running Longhorn, MSHTML can run on Longhorn - no surprises there. But, Longhorn as currently configured is not using MSHTML for its HTML rendering from managed apps - one would assume that MSHTML would ship in the GAC.
If he's not running Longhorn then just shows the problems of trying to write an app in .NET that uses HTML.
Personally, I reckon he's not running Longhorn - it'll be running on Tablet PCs