Apple announced it had passed the 85K milestone on September 28th, and will likely announce the 100K milestone the day that number is available for actual download, which could be as early as the next three or four weeks at the current rate of progress.
Google’s Android platform is #2 in terms of the number of apps, with some 11,284 apps, according to Androlib.com. Research In Motion’s BlackBerry App World currently lists 3,066 apps.