This job is easy. I just don't have the time to do it.
I need a script that has a select menu w/options for "blogger (beta) blog", "blogger blog", "wordpress blog", "movable type blog".
Once a user selects their blog,
They will be prompted for username/pass (if blogger) and field for "MT cgi-bin:" and username/pass (if movable type) and field for api endpoint (i.e. [url removed, login to view]) and user/pass (if wordpress).
Once they enter this info, they will be told to select which blog(if they have multiple under that username/pass) they wish to post to.
Then they will be shown:
Subject field, body field, and list of categories to post to and a submit button. The script will then submit to their personal blog.
There are a bunch of scripts out there that are already written you could use, so this should be easy.
I will require you to have a working copy of the script (online somewhere, or I can upload to my server) in order to test that it is working. I've been burnt before on paying for non-working scripts.