It looks like this: embedding a bit of code on your site, you can show your users the top 10 rankings for a particular keyword. For example, if you are searching for "Google," you'll be presented with the following (or similar) box:
So the forum member asks: should you put one of these on your site? It's almost an endorsement from Google.
Many forum members think that it's not a good idea. After all, by doing so, you're promoting yourself and 9 competitors. Do you really want people to start analyzing the competition or looking elsewhere?
If it's something you want, I think the best bet is to look at it internally so you can analyze the data that way.
Forum discussion continues at High Rankings Forum.