Pony So omiewise mentioned that he'd like to keep a beady eye on what folks from here post. I immediately thought "oh that's easy" rustled something up in about fifteen minutes which worked beatifully. And then it broke the site. I've got it working now though although we are rather at the mercy of MeFi's atom feed which can be a bit flaky - we'll see how it pans out. Anyway, all it does is match usernames in the MeFi posts with user names here - and that's as about as sophisticated as it's likely to get. Enjoy.