VMware Fusion, for some reason, identifies the G1 as ‘High Android Phone’ when connected via USB. OS X only sees it as ‘Android Phone’ and Vista (once the drivers are installed) sees it as both ‘Android Phone’ and ‘HTC Dream Composite ADB Interface’.
(Thanks to the generosity of a friend I’ve recently come into possession of a T-Mobile G1 phone running Google’s Android. It’s only costing an extra $20/mo for unlimited data, so I’ve been using full time since I received it. It’s really nice, and I’m sure I’ll write more about the phone, its OS, and the dev tools later.)