It's worth noting that this common complaint about the Viewsonic: "The software is the big deal breaker here. It comes with this version of android 2.2 made by Viewsonic in which everybody's opinion it's the worst thing ever made." (emphasis mine)

The products were even recalled in December, sounds like because of the software issues. In the amazon listing, comments refer to Viewsonic finally letting people choose regular Android over their own Android version.

So I'm not entirely sure it's fair to use this product as an example of a larger Android tablet currently running Froyo. It looks like Viewsonic (unsuccessfully) tried their own hack version of 2.2, and a lot of owners were left trying to hack it themselves to make it useable.

Note: I've never used one, so I'm just going off what other people have written, but I was looking into tablets yesterday and reading about this one. If someone actually has one, please comment.