WordPress.org

Is PhotoSmash free?

Yes...it's licensed under the GPL.

How many galleries can a Post have?

Unlimited. Just add as many [photosmash=%id%] tags as you like...But performance gets to be an issue at some point.

Who can upload images to a gallery?

You control this on a gallery-by-gallery basis (you can also set a default for PhotoSmash that all new galleries will inherit). Your options are Admins only; Admins, Authors, and Contributors (anyone with level1 or higher roles); or Register Users (level0 roles).

Can unregistered users upload images?

No...not at this time.

How can I upload images to a gallery before adding to a Post?

You can't.

How do I change the appearance of my galleries?

In the bwb-photosmash plugin folder, there is a css file: bwbps.css It should be relatively straight forward to change the look and feel through this file.