Microsoft has been running an online Olympics promo campaign centered around the MSN / NBC Olympic Games partnership.
Another 'quieter' MS beta product known as Live.com xRank just added and Olympics specific tab.
There have been many 'what's hot' and 'what's being search right now' products over the years, but the relatively new xRank deserves a peek. It's a quick take (which is nice) and it'll be interesting to see how the Olympic titles unfold as the games officially begin.
Finally, if you want to chime in on where you're watching the Olympics, either online or elsewhere, (and help a few that appear to have been 'blackout-out' in various countries), the thread started with our previous piece is still open to comment on FriendFeed here.