The last time I looked there was a single phone sold and branded by Google, the Nexus One and it's only available to GSM networks at the moment.
Where are these other Google phones on Verizion?
The Droid Eris is a HTC handset and the Droid is a Motorola Handset.
The Nexus One is an HTC handset, it's just made for Google to sell and brand.
While technically you're correct that there are no exclusively "Google" branded phones on Verizon, the Droid and Eris are Android phones, and Android means Google for the most part. For many, there's no distinction.
Other Android phones are marketed as Such-&-Such-With-Google as well.
Also, don't forget the Nexus One is "coming soon" or "this Spring" to both Verizon and Sprint. Spring starts in March, correct? There have been blogs posting of news that hints Sprint's getting the Nexus One as early as March.