Great article!!! I guessed it right in the last article that Tmobile would be the network partner of choice. I like your idea of a potential Sprint/Tmobile network sharing deal where Tmobile would lend Sprint its excess PCS spectrum in exchange for future LTE service for their customers since it gives Sprint more spectrum to deploy additional LTE channels and in some cases wider channels.
Sprint has been on a partnership frenzy lately and it wouldn't surprise me that this is something that they may consider but of course it will take tons of planning before it comes to fruition. If Sprint were to do a deal like this, I couldn't see this being announced until at least mid 2013 since Sprint wants to make sure that 60-70% of the nation is covered with Network Vision towers so that the project doesn't seem so far fetched for Tmobile. If a deal were to be announced now, it will be useless since Tmobile will still have to wait until Sprint blankets the nation with Network Vision towers. Sprint doesn't need this distraction when their main focus should be to improve the tower infrastructure and user experience first.