I'm having no luck watching the Silverlight Firestarter videos.  I've even tried downloading them in all variations and eventually connection drops.  I did a tracert to see what might be happening and visualroute says that theirs 100% packet loss at channel9.msdn.com [65.52.21.59]

tracert channel9.msdn.com

Tracing route to ch9production.cloudapp.net [65.52.21.59]
over a maximum of 30 hops:

  1    37 ms    45 ms    45 ms  65.14.xxx.xxx
  2    37 ms    41 ms    37 ms  68.152.174.117
  3    43 ms    47 ms    46 ms  12.81.20.12
  4    44 ms    47 ms    45 ms  12.83.6.70
  5    42 ms    47 ms    47 ms  12.81.28.25
  6    45 ms    45 ms    46 ms  74.175.192.30
  7    46 ms    46 ms    48 ms  cr2.ormfl.ip.att.net [12.122.106.70]
  8    87 ms    97 ms     *     cr81.fldfl.ip.att.net [12.122.1.46]
  9    44 ms    50 ms    53 ms  fldfl01jt.ip.att.net [12.122.81.25]
 10    57 ms    56 ms    54 ms  192.205.36.254
 11   102 ms    53 ms    52 ms  ae-1-51.edge1.Miami2.Level3.net [4.69.138.75]
 12    53 ms    46 ms    50 ms  MICROSOFT-C.edge1.Miami2.Level3.net [4.59.80.22]
 13     *       84 ms   103 ms  ge-5-3-0-0.ash-64cb-1a.ntwk.msn.net [207.46.46.177]
 14   136 ms    80 ms    86 ms  ge-3-1-0-0.blu-64c-1a.ntwk.msn.net [207.46.47.29]
 15    88 ms    96 ms    96 ms  xe-0-1-3-0.ch1-16c-1a.ntwk.msn.net [207.46.46.169]
 16     *        *        *     Request timed out.
 17     *        *        *     Request timed out.
snip Note: same for 18 through 28
 29     *        *        *     Request timed out.
 30     *        *        *     Request timed out.

Trace complete.