I just signed up for a 30-day trial for our Google Apps domain. After accessing the initial JIRA instance, I proceeded to follow the directions for importing data from my current JIRA (4.2) Standalone instance. I performed an XML backup of Issues plus compressed tar files for attachments and avatars and proceeded with the OnDemand Import wizard. The import process took about 10 minutes after which I was logged out of the system. I am unable to login using my Administrator credentials after the import process completed.