If Outlook 2007 is constantly asking to enter your password, even though you've enabled Remember password, try the following:
I came across this application when I was looking into software that does just that:
http://www.geniusconnect.com/geniusconnect.asp
It enables synchronization of Outlook/Exchange folders with a relational database; anything with an ODBC driver is supported (MS-SQL, MySQL, ...).