Shoutbox

I am a big fan of Messenger Plus!, but I am wondering where it stands legally.  Messenger Plus! clearly modifies the functionality of Messenger, which MS allows?

The reason I am asking is because I am thinking about making a small plug-in myself.  I have no grand aspirations like Messenger Plus!, but I have a few small ideas of my own.  I would like to know how Messenger Plus! gets approval directly or indirectly from MS for this plug-in. 

If anyone has any suggestions regarding this issue (where to find the Messenger EULA, which parts of the Messenger EULA to read, any other legal documents MS has put out on Messenger plug-ins, other precedents, other threads) I would be very grateful.

Thanks everyone for any help you can contribute.

Wix