For some reason (we strongly
suspect a configuration error at NET99) our traffic failed to reroute
over our MCI T1 for several hours. (They have a habit of broadcasting
static routes to route around outages, thus completely screwing their
multi-homed customers.)
I can confirm that this isn't the first time that this has happened.
Hopefully reports such as this will make ISPs aware that static routes
aren't a good solution for dual homed customers.
I also recommend bringing as much as possible of your routing announcements
in-house (ie, run BGP).