Developer (and sometime TUAW commenter) Matt Ronge has announced he's closing the source of the upcoming IMAP email client Kiwi he's been working on. It's a decision that's been a long time coming, he says, and most of the feedback he's gotten has been positive towards closing the source, so he's going ahead with it. MailCore and libetpan, the two code frameworks Kiwi is built on top of, will both remain open source, so the possibility of someone else building an open source client off of MailCore is still there.
The question is, will Kiwi be worth paying for? The answer, as usual, is "depends." Ronge has some great ideas for how a well built IMAP client could work, but the proof is in the pudding, and right now, all we've got are some screenshots. Kiwi promises Address Book and Spotlight support, LUA customization, and good performance and scalability. If Ronge can make his app do all that, most users will be happy to pay for his hard work.
[ via Brent Simmons ]