A while back, there was some interest on the VSX forum around adding back functionality to have "Match Case" and "Match Whole Word" buttons on the toolbar in Visual Studio 2005. At the time, I created a little addin to do this and just posted it to a website I had access to.
In the meantime, I accidentally deleted the files from the web server (oops). Also, some folks have been asking if there was a version that works with Visual Studio 2008.
I've set up a page on the MSDN Code Gallery to be a permanent home for this addin. I've released files that will allow you to install the addin for both Visual Studio 2005 & 2008. You can also download the sources if you're interested. Please open any bugs you find on the Issue Tracker page. Enjoy!