Hmmm ... it appears that the publishing wizard uses 2 config files for it's application configuration:
The Publish Database Wizard uses the
files user.config and hoster.config to
store configuration information. The
directory in which these files are
stored must have the appropriate NTFS
file system permissions set. These
files contain user names and encrypted
passwords. The passwords are encrypted
by using DPAPI.
user.config File
This file stores persisted host and
configuration settings for the Publish
Database Wizard. The user.config file
is located at %SystemDrive%\Documents
and Settings\%Username%\Application
Data\Microsoft\Microsoft SQL
Server\90\Tools\Publishing
Wizard\user.config.
hoster.config File
This file stores options about Web
service addresses, user names, and
databases for shared hosting
providers. The hoster.config file is
located at %SystemDrive%\Documents and
Settings\%Username%\Application
Data\Microsoft\Microsoft SQL
Server\90\Tools\Publishing
Wizard\hoster.config.
I'm trying to access these files in Vista (with VS2008 and SQL Express installed) and striking out. I'll keep you posted.
Update: Looks like I didn't have the Publishing Wizard installed after all. After grabbing the version for VS2008 here, and then installing (and don't worry -- you won't see any indication it's getting installed, but it does).... and THEN setting up my first database using the wizard, it looks like there are indeed some settings stored uder the 'Application Data' directory listed above. However, it looks like it's just a user.config, and then an XML file for each database configured. I believe you can backup each of these files for later use.