Trying to play catch up on the industry as I've been extremely busy lately. I've come across several blog items from other community guys that I thought were important to share. All of these items have something to do with Terminal Server scale / performance.
First Michel Roth of ThinComputing.net pointed me to a new free utility from Warren Simondson of Ctrl-Alt-Del Consultancy called TSLoadStat. This is a command line utililty that measures a few server performance stats and reports them on the command line. While I don't personally find static measurement tools a good indication of server performance (especially because often these tools induce their own load that artificially makes the server look terribly busy when it's not, it's still worth mentioning here). You can find the information on TSLoadStat here.
Next, Al Solorzano has a nice writeup on 32-bit vs 64-bit from a Terminal Server perspective. While many people have discussed the merits of 32 vs 64 and kernel memory limitations, etc. Al takes it a step further to discuss the many gotchas that you'll run into and potential work arounds.
Michel Roth of ThinComputing.net has a nice write up on a feature of 2008 Terminal Services called Dynamic Kernel Address space. Essentially this is a feature that allows the operating system to dynamically adjust the barrier between kernel and user memory space. This should ultimately result in higher scalability in 32-bit Terminal Server platforms. If you've decided to not take on the things that Al mentioned above.
Next, Gus Pinto has pointed out a link to a 2008 Components Poster. While this isn't directly related to Terminal Server scalability and performance, it's a great wall chart to have printed out so you're familiar with all the moving parts in 2008 Server.
Finally, 2008 Server has RTM'd. This means we're just around the corner for shipping product.
Exciting stuff.