According to a report by Pocketnow, the WP7 marketplace has hit the target of 10K apps in 4.5 months beating the record of Apple App Store which took 4.7 months. The Android Market took 11 months to reach that target. The app approval rate by Microsoft has been increased to about 1200 apps per week which was about 1000, couple of weeks ago. Now the app store and the Android market boast of 3,00,000 and 2,00,000 apps, therefore WP7 has a lot of catching up to do. Though it's just around 10K for now, that number will surely shoot up once we see a Nokia phone with WP7 on it.