Microsoft's Windows Phone 7 was missing a critical feature -- web video -- when we previewed it late last month, but it appears the platform may have at least a YouTube solution before all is said and done. A former Microsoft program manager with access to the Windows Phone 7 Marketplace tweeted the above picture earlier this week, which shows that there are at least placeholders for a variety of games and productivity tools as well as Yelp and YouTube -- the latter of which is listed as a "Music Hub Add-On." We tried to access the catalog ourselves from our test units and did
