Pocket Informant itself does not sync PIM data to the desktop or any servers. Instead Pocket Informant uses the Pocket Outlook databases directly so whatever
syncs with Pocket Outlook works with Pocket Informant. If you uninstall
Pocket Informant, your data is untouched.
Now most sync solutions do not sync with extra Pocket Informant data such as custom fields, links, journal, icons, etc.. Journal Sync is the only product we offer that relies on ActiveSync and Outlook on the desktop.
If you are looking to see if Pocket Informant specifically syncs with an Google Calendar, an iCal server, or anything else the answer is that's not Pocket Informant's purpose. There are many applications available on Windows Mobile available to sync your PIM data with non-Outlook services.