Here are my traceroutes, the first from when b.org was effectively unresponsive, and the second when it was fine.
Bad times:
1 16 ms 31 ms 31 ms lsanca1-ar3-4-47-028-001.lsanca1.elnk.dsl.genuity.net [4.47.28.1]
2 31 ms 31 ms 47 ms a6-1-2.lsanca1-cr5.bbnplanet.net [4.0.1.85]
3 32 ms 46 ms 32 ms p3-1.lsanca1-cr6.bbnplanet.net [4.24.4.25]
4 32 ms 47 ms 31 ms p6-0.lsanca2-br1.bbnplanet.net [4.24.5.49]
5 31 ms 31 ms 31 ms so-5-2-0.bbr1.LosAngeles1.level3.net [64.159.4.25]
6 47 ms 31 ms 47 ms so-3-0-0.mp2.SanJose1.Level3.net [64.159.1.130]
7 31 ms 31 ms 47 ms so-7-0-0.gar2.SanJose1.Level3.net [64.159.1.78]
8 32 ms 31 ms 47 ms so-7-0-0.edge1.SanJose1.level3.net [209.244.3.142]
9 47 ms 47 ms 31 ms gige-g3-0.gsr12012.sjc2.he.net [216.218.214.221]
10 31 ms 47 ms 32 ms gige-g5-0.gsr12008.fmt.he.net [216.218.214.217]
11 47 ms 31 ms 78 ms 64.71.131.174
12 47 ms 32 ms 62 ms mercedes.elinuxservers.com [64.71.154.39]
Good times:
1 16 ms 31 ms 31 ms lsanca1-ar3-4-47-028-001.lsanca1.elnk.dsl.genuity.net [4.47.28.1]
2 31 ms 32 ms 31 ms a6-1-2.lsanca1-cr5.bbnplanet.net [4.0.1.85]
3 31 ms 15 ms 32 ms p3-1.lsanca1-cr6.bbnplanet.net [4.24.4.25]
4 47 ms 47 ms 31 ms p6-0.lsanca2-br1.bbnplanet.net [4.24.5.49]
5 31 ms 32 ms 31 ms so-5-2-0.bbr1.LosAngeles1.level3.net [64.159.4.25]
6 32 ms 46 ms 32 ms so-3-0-0.mp2.SanJose1.Level3.net [64.159.1.130]
7 32 ms 47 ms 31 ms so-7-0-0.gar2.SanJose1.Level3.net [64.159.1.78]
8 109 ms 47 ms 47 ms so-7-0-0.edge1.SanJose1.level3.net [209.244.3.142]
9 47 ms 31 ms 47 ms gige-g3-0.gsr12012.sjc2.he.net [216.218.214.221]
10 47 ms 47 ms 31 ms gige-g5-0.gsr12008.fmt.he.net [216.218.214.217]
11 47 ms 47 ms 31 ms 64.71.131.174
12 47 ms 47 ms 31 ms mercedes.elinuxservers.com [64.71.154.39]