T-Mobile USA offers IntelliSync for Sidekick0
T-Mobile has announced the availability of IntelliSync for Sidekick and Sidekick II phones. The software allows the user to synchronize their devices with Microsoft Outlook over the air. Unfortunately, you can not synchronize your emails or notes with it. Only Contacts, Calendar Events and TO-DO items will be synced. Another shortcoming is the support of MS Outlook only, not the free MS Outlook Express version. If you are still interested, visit this T-Mobile's site.