Just got the email and setup http://www.websamba.com/dpyers
They do not allow you to have any directories above the root web space and you can only have one site per account, so you can't share a database between sites that way.
Just a tip...
You'll have to have your access data base in your webspace. This means that anyone who knows what application you're running can figure out where to go to download it.
To prevent this, rename your database from mydatabase.mdb to mydatabase.asp. Change any references to it in the code to end in .asp as well.
The code can still read/write to it as an access database no matter what you name it. By naming it with .asp, if anyone tries to download it, the webserver will try to serve it up as an asp script, and the user will get an error.