I've been using LL's code for doing this:
http://weblogtoolscollection.com/archives/2004/02/08/technorati-link-cosmos-using-php/
but recently, two problems:
1 - Technorati descends into some sort of coma and decides never to respond (this happens daily)
2 - the cached results get wiped somehow which means first the user has waited an age for the Tech result, then sees an error when the cache isn't there.
I like the principle of tracking incoming though - anyone got any ideas / solutions ?