The iPhone’s screen still appears to be the most prominent real estate for mobile advertising according to figures released this week.

Mobile advertising network AdMob, which recently caught the eye of web giant Google, said that 50 per cent of ad requests from smartphones in its system in October were from the Apple mobile OS. Symbian, which dominates the smartphone market in terms of platform, was only responsible for 25 per cent of requests, followed by Android with 11 per cent and BlackBerry with 7 per cent.

Interestingly however, new devices from RIM are generating an increasing percentage of the total number of requests for the platform, with the recently launched Tour and new versions of the Curve (8900 and 8520) gaining traction.

Meanwhile, Android, which is a relative newcomer, has seen worldwide requests increase 5.8 times since April in the AdMob network. The HTC Dream, known as the G1, has continued to experience strong growth over the past six months and the launch of new devices is driving significant incremental growth in Android traffic.  The Motorola Droid already represented 24 per cent of all Android requests in AdMob’s network two weeks after it launched.

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