A user asked about ExQuilla and Thunderbird Portable.
As far as I know, there is nothing about the design of ExQuilla that would prevent its use with Thunderbird Portable. I downloaded it and tested using today's current versions (Thunderbird 24.0 and ExQuilla 24.5), installing to a USB dongle. Everything seemed to work fine. Initial downloads of the emails seemed fairly slow (about 1-2 per second, which is perhaps twice as slow as normal), but after download the email access by the user interface seemed pretty normal, which is fast.
I would appreciate if any user experiences with ExQuilla and Thunderbird Portable be posted as comments to this message.