After discussions with jailbreakers, Microsoft opening up WP7
techeye.net
techeye.net
One of the commenters there says that Microsoft is finally seeing sense about these things, but I think it's probably just 2 isolated cases. They will continue to make the same mistake in the future, even though the open-ness of Windows was what created their empire.
Time will tell, though.
I saw my first WP7 mobile in the flesh today, and I was impressed - but without the backing of developers it could be a niche product.
Question to coders out there; Will this make a difference to you? Will you now have a go at coding for WP7 - or will you be waiting to see if the phone is a commercial success before testing the waters?
However, if it weren't open, there is absolutely no chance than I'd attempt to code for it, since I don't own one and don't plan to. iPhone is in the same category.
Android... I probably will. (Both because it's open, and because I own one.)