It's pretty easy, actually. In fact, you can upsize (I think
that's what Microsoft calls it) an Access DB to a SQL Server 2005
database. This is about as painless as it gets. If I recall (it's
been years since I had to do this), it's about as simple as
"opening" your Access database in SQL Server Management Studio (the
GUI application for working with SQL Server 2005).
For a conversion to MySQL (which is a free, open source DB,
as opposed to SQL Server), it's also not too difficult. Here's a
link to an article on MySQL about converting from SQL Server and/or
Access to MySQL. Towards the end of the article, there is a list of
utilities that can perform the base conversion for you.
http://dev.mysql.com/tech-resources/articles/migrating-from-microsoft.html
There are lots of way to get the data across and, ultimately,
none are too painful. Plus, once you get to MySQL or SQL Server,
you can do a LOT more with your database!!
I hope this helps get you rolling...