For 'big sites' how about VitalPS/TSYS for CREDIT CARD AUTHENTICATION/VALIDATION? That's huuuuuuuuge.....
I have several dozen sites I needed to make Corporate routing changes for in order to properly accommodate them taking credit cards from their customers.
While at first glace it's same old crap, at a deeper level there are hundreds of thousands of dollars at stake here.
Hmm...went to a LEGO store (they don't make the 5000-piece buckets anymore!?!) tonight and the clerk apologized for the slowness in ringing up the order. She said the system had been slow all night. Might the internet rift be the cause? Just conjecture...