BirdieSync 2.0 has been released which supports synchronization of Pocket Outlook with Thunderbird cards and mails, and Lightning or Sunbird events and tasks.
Birdiesync has it's own synchronization engine and does not rely on ActiveSync. The synchronization engine maintains a history, manages unresolved items, and allows for multiple computer synchronization. The independent sync engine may create an unexpected benefit for those wanting to sync their Windows Phone with a home computer and an Exchange Server.
Reading from the FAQ of BirdieSync's website, "It is possible to synchronize your mobile device with Outlook if it is installed on a different computer (without Thunderbird/Sunbird being synchronized on this machine). So you can synchronize your mobile device with Outlook and Thunderbird if they are installed on 2 different machines. Simply be aware that all the modifications performed on either computer will be replicated on the other one." This may not be possible if you're running Windows XP the drivers for Windows Mobile Device Center (needed to connect your Windows Phone to your computer) are bundled with Activesync. But if you're running Vista or Windows 7, it might be worth a try.
BirdieSync is compatible with Thunderbird 3.1, Lightning 1.0b2 and Sunbird 1.0b1. It is available for Windows XP, Windows Vista and Windows 7 (32 and 64 bits). You can download a 21 day trial version of BirdieSync here and it will set you back 19.95 Euros (about $25 USD if my conversion rate is correct).