As soon as there is threading/conversation support,
I will definitely buy it. Because then it's the best e-mail app ever!
I paid anyway, in order to add my
practical support to that ongoing development, not just my words. Sure there are still things that could be added (aren't there always, with anything in life?) but overall I use this app multiple times every day so in my opinion that makes it more than worth paying for.
And Kostya, please don't start being hard on yourself again - your work is VERY MUCH APPRECIATED out here!
Of course that doesn't mean that I'm not still hopeful that my own little feature request (optional coloured backgrounds to better highlight emails from different accounts in Message Lists / Smart Folder) might not be addressed at some stage

but I'm certainly not going to say I won't pay for the app until it's included!
Andre