Hi Everyone – I am very pleased to announce that the new 2007-compatible version of Chatter for SharePoint is now available! You can download the latest version here. To my knowledge, this is the only solution that integrates SalesForce Chatter with SharePoint 2007.
All three versions of the solution are functionally identical – except where differences in the platform need to be handled. For example, since SharePoint 2007 does not have the Ribbon, the Share options are located in context-menus.
Some screenshots:

Above: Chatter for SharePoint 2007 web part.

Above: Share Page context menu.

Above: Share Item context menu.

Above: Federated Search Integration
The 2007 version works on all x86 versions of SharePoint 2007 (WSS 3.0, Standard and Enterprise). Check the documentation for other system requirements and prerequisites.
A new version of the 2010 and 2013 solutions are also available which include some cosmetic updates and fixes.
Version 1.3.0.0 changes include:
- Initial support for SharePoint 2007
- Fixed issue where under certain conditions the authorization token would not be written to the user’s profile
- Fixed gradient background when running on Internet Explorer 10
- Added support for Chatter API version 26
- Minor cosmetic tweaks
- Some internal code improvements
The 2007 version is licensed in the same manner as the other versions – by farm. Same price too, just $49 USD. I’m very happy to offer solutions for these platforms. Please check them out and be sure to send me any comments or suggestions. Thanks!