About an hour ago (10:00 AM PDT/17:00 UTC), after more than 18 months since the first Alpha (December 8th, 2006) was released and nearly 3-years in development Firefox 3 has been released.  However, chances are you won’t be able to get it without a bit of wait. Mozilla wanted to get it the Guinness Book of Records for the most downloads within a 24-hour period. As a result all of Mozilla’s servers are overloaded. Earlier it was taking several attempts just to connect to getfirefox.com, however now users are getting a Http/1.1 Service Unavailable error when attempting to connect. When…