If you’re using the Google Toolbar and Internet Explorer 8/9 you might have experienced bad browser performance (I did). There is an update from Google that seems to solve these issues. It did for me so far. The Microsoft KB can be found here but since that article only refers to the Google site, you can get the update directly from here
Those of you who work with Microsoft Outlook 2007 and Office Communicator 2007 might be interested in this one. On the MSDN code Gallery you can find a Communicator Add In for Outlook 2007. Instead of switching between the two applications, the Add In embeds your Office Communicator contacts in Outlook 2007 as shown in the picture below.