It seems like the only way to get approval for a Bot account is if it adds to or edits information already on Wikimedia. If you try to download any images, without a bot account, using some of the api libraries out there you get error messages instead of the images. Seems like they block anyone not coming in from a browser? Anyone else have any experience with this? Am I missing something here?
Having just done this myself I feel I should share:
http://www.mediawiki.org/wiki/API:Allimages
This API document does state that you can query the images:
with the aiprop=url you are given the url of the image you are looking for.