Download of Thunderbird_Portable_1.5.0.10_en-us.paf.exe (Thunderbird_Portable_1.5.0.10_en-us.paf.exe ( external link: SF.net): 6,282,546 bytes) will begin shortly. If not so, click link on the left.
The Mozilla Thunderbird®, Portable Edition project is now part of the PortableApps.com project: http://sourceforge.net/projects/portableapps