Main picture on new jboss.org homepage (served from https://www.jboss.org/dms/content/singular/homespot-full-nobttn-sprite.png) is too big, around 500kB. Killer for mobile devices definitely.

Other too big files:
https://www.jboss.org/dms/developers/developers_header.png 300kB used on http://www.jboss.org/developer
http://www.jboss.org/dms/content/singular/projects_communitygraph.png 500kB used on http://www.jboss.org/projects