"Why being modest?"©® ;)
I'm testing Thunderbird... and I'm very happy to discover this mail client... it's slow (I'm syncing my trash account for 3 hours now... only 15.000 mails ;), lot of things that myoe does can't be done with this client (well I guess it does lot of things that myoe doesn't... but hey! you know that my judgement is biased ;).
In short, I thought at first that I would find "a product that maybe one day myoe will reach", it's more "another project in development".
Well... on the other side, I'm not the perfect end user, so please if you use thunderbird, tell me why! If I can borrow some great idea from a project like this one... myoe will just be better.