Since we last took stock of the state of Windows Phone 7 last week, the OS has massed the 4000 app milestone, adding hitting 4,292 apps, adding 446 since last week. At this rate, with about 2 weeks left in the year, the total is on track to pass 5000 by the end of the year, passing the number of apps on WebOS easily.
Monthly Facebook users have also increased steeply, as can be seen from the graph above, rising from 180,786 to 209,961, adding around 30,000 users.
Ad company Chitika also revealed the web usage of the Windows Phone 7 installed base has hit around 1% of Androidâ€™s, and 0.6% of iOS, no mean achievement for an OS less than 2 months into release, and a number which suggests around 700,000 Windows Phones sold so far.
While Windows Phone 7 can not hold a candle yet to the interest in iOS and Android, the amount of searches for WP7 has continued to rise since the announcement of the OS, surpassing the volume of webOS already, suggesting, if anything Windows phone 7 is not going to be the 5th mobile OS after all