Hi Dave,
On categories, yes: in addition to the category dropdown that you can put in a custom form with [post_cat], you can use as many hidden input fields as needed to automatically add all of the categories you want:
<input type='hidden' name='bwbps-post-cats[]' value='56' />
The value is the ID of the category.
On displaying collected data, yes: so part of the beauty of PhotoSmash is that it is a pretty awesome (if I can be so biased) form engine. But people tend to think of it as solely a Photo Gallery. Say you wanted to do a contact form, you could create a gallery that would collect your data. Build custom fields for it, build a custom form for it, tell it to allow "no-image" submission...meaning that it wouldn't require an image. Then you could display the data in a custom layout...you could build a straight table display, or really any display you want. The custom layout, you would tell photosmash what you wanted a single record (and optionally, what you'd like alternating records to look like), then it would display the data...just don't include the [image] or [thumb] field, and it won't show a picture ;-)
BB