I've also created a v2.beta section on my site. Although I modified the theme somewhat, I didn't spend too much time on that, because with a new update those changes will be gone.
The site is http://www.hw-photo.nl/v2/
Some extra features I would like to see:
Possible to add a name/site information like you could put the title of the gallery above the imaged window in v1. Now it's not a full website, but only part of it, which v1 was.
Sitemenu, with the possibility of a contact form.
Maybe even a way to order pictures? I can see that I can add the price of a picture in the admin section, but it doesn't do much yet.
Some bugs:
When I want to create a new theme, or copy the settings of another one, I can change all options, but then when I save it, the normal theme is changed, and the newly added theme isn't reachable anymore. When I click edit on the new theme in the admin section I'll just get a blank screen.
However, It looks very nice already.
On the thumbnail view, if you rollover an image, it gets enlarged. Default is 150%. However, this shows the images with blocked pixels, artifacts. Isn't it an idea to create thumbnails of 150px and then in the thumbnail view show them as 67%, and with mouseover at 100%? Just an idea?