Pat,
I’m not sure if I missed it, but it looks like value is no longer set in locations list:
https://sites.google.com/a/webpagetest.org/docs/advanced-features/webpagetest-restful-apis#TOC-Location-information
This was quite helpful for ShowSlow which shows API endpoints dropdown based on this call - I do want to add an override in ShowSlow, but it would be great if WPT instance provided a reasonable default (right now it defaults to IE6 because it’s a first location in the list).
I created a bug in bug tracker:
http://code.google.com/p/webpagetest/issues/detail?id=44
Hope this helps.
Sergey