Patchou wanted to do that in the past, but people started complaining even before a single line of code was released.
AFAIK there has never been a single line of code released to the general public EDIT: Look at WDZ's post
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Read through the topics:
Messenger Plus! Code Sharing, what's your opinion about it? (MSN Fanatic forum)
Knowledge sharing - troubles
Knowledge sharing - replies
Let's talk again about code sharing
Personal Message
I'm not sure Patch wants to give it another try. Would be very nice of him if he did, but I can understand the reasons not to do it.