I\'ve read that Silverlight 2.0 imposes by design an asynchronous model when communicating with the web server. I haven\'t had a chance to experiment with Silverlight, but I
Firefox is also limited to two connections, in addition to IE as stated already.
Note that the limit is per hostname.
If you add entries to your hosts file, or use dns aliases you can get more connections. For example in testing, add lines like '127.0.0.1 test1' to your hosts file, and then you can open two connections to http://localhost and two more to http://test1