There were no new releases during the week of August 3rd-August 9th.
Firefox 18.104.22.168 – September 2nd. Also purposed Major Update to Fx 3.0.2 for this build
Firefox 3.0.2 – September 2nd.
Firefox 3.1b1 – August 2008
Thunderbird 22.214.171.124 – TBD, Possibly September 2nd as well as should be able to do 3 releases (Fx 2.0.0.X/Fx 3.0.X and TBird 2.0.0.X) at once.
Thunderbird 3.0a2 – August 13th?