На форуме ноклы кто-то заметил, что в документе Windows ® Phone Marketplace APPLICATION PROVIDER AGREEMENT есть такой пункт:

“Excluded License” means any license requiring, as a condition of use, modification and/or distribution of the software subject to the license, that the software or other software combined and/or distributed with it be (i) disclosed or distributed in source code form; (ii) licensed for the purpose of making derivative works; or (iii) redistributable at no charge. Excluded Licenses include, but are not limited to the GPLv3 Licenses. For the purpose of this definition, “GPLv3 Licenses” means the GNU General Public License version 3, the GNU Affero General Public License version 3, the GNU Lesser General Public License version 3, and any equivalents to the foregoing.

Ссылка на форум:  http://discussion.forum.nokia.com/forum/showthread.php?219222-Symbian-C-to-WP7-migration-questions

Ссылка на сам agreement (pdf):  http://create.msdn.com/downloads/?id=638

Также на том форуме обсуждаются и другие недостатки wp7.

Дискас.