Developer reply by Oliver S.
Rated 1 out of 5 stars
Trying to use this with Ubuntu 11.04 on a 64bit install and the nightly updater extension doesn't even look for a 64bit version of lightening, so I just get errors.
"Lightning" could not be installed because it is not compatible with your Thunderbird build type (Linux_x86_64-gcc3). Please contact the author of this item about the problem.
Yes 64 bit nightly builds are relatively new there. I've added support for Linux 64 bit, currently pending review.
To create your own collections, you must have a Mozilla Add-ons account.