For contacts, check out Paul Berkowitz's "Export-Import Entourage" script
package.
<
http://www.scriptbuilders.net/?search=Export-Import+Entourage>
For mail, see this information:
This page has a pretty clear tutorial for moving mail from Outlook to
Entourage.
<
http://www.riches.com.au/articles/export-outlook-entourage.htm>
Outlook2Mac advertises that it can automate the same procedure. However,
some users have noted that contacts, calendar events, and tasks don't always
transfer properly.
<
http://www.littlemachines.com/>
Alternatively, you can use an IMAP server to transfer mail. You can get a
free IMAP account at <
http://www.bluebottle.com/>. Create folders matching
your local folder structure on the IMAP server. Drag-copy messages from
Outlook to similarly-named IMAP server folders. Go to Entourage and access
the the same IMAP account. Drag-copy messages from the server folders to
similarly-named local folders. If necessary, delete messages from server,
go back to the exporting program and repeat the process as often as
necessary until done.