Mary
Recently noticed your posting. Katie moved on several months ago. I believe she is taking time out to be a mom.
How did the gig circuits work out for you?
Mary
When you're sufficiently multi-homed, you can adjust for carrier events as necessary. But one thing that can limit the amount of adjusting you need to do, is support for traffic engineering via BGP communities.
Per http://www.onesc.net/communities/as4323/ , TWTelecom has some bare-bones TE-communities. Many other carriers provide finer-grained traffic tuning communities.
You have decided to late, because i have dumped it from my life time long back and had a very causious experience like this. Better talk to your department and find right path and get a solution.