I was wondering if its possible to post and get information from inside an MT blog page from any of the databases that MT runs on. Seems like I should be able to... can anyone point me in the right direction?

The answer to your question depends on what type of database you're using. It's possible, for example, to extract info from the mySQL database using PHP. There is also an SQL plugin. What did you have in mind?

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Right now I'm using MySQL. I don't mind changing to the DB that makes it happen.

Basically, we would like to have a simple form embedded in a page that allows people to sign up for activities- and have that form data filed in the database to be retrieved by someone else. I don't see any problem pulling data from the DB its the posting data too it I am fuzzy about.