tve wrote:why not use something like <a href="http://forums.mozillazine.org/viewtopic.php?t=13194">this</a> - a built-in extensions manager
While that would be cool, I would suspect it would require Scott to maintain a database, and personally I would prefer he spent his time improving Thunderbird and not maintaining a database =).
Once Thunderbird allows extensions, it's trivial getting EM to work in thunderbird, and it could parse the data from the <a href="http://extensionroom.mozdev.org/er-xml.html">Extension - Room XML File</a>.
--Jed