Sparx Systems . COM

This is daddy of all Resources. HQ. Thrush Central. The Bat Cave.

It has an online version of the EA help files which is searchable, as well as white papers and other useful bits.

Go to Sparx Systems .com 

This Site also has the ONLY online forum to which Sparx themselves will contribute. Understandable, as otherwise they would have to monitor 100s of sites all over the place.