> Is there a module available for accessing MS-SQL?

Yeup. Check out http://www.ruby-lang.org/en/raa-list.rhtml?name=Ruby%2FODBC.
I've used it in a couple of small projects against SQL Server 7, and it's
worked great so far. Only snag I hit was it didn't support returning
multiple result sets in a single query -- but I hit up the author on it and
he sent back an update in a couple days -- I haven't gotten to play with it
yet to see if it's working.

Chris