For the first time ever, Android has tied with Apple's iOS platform in terms of mobile ad impressions on Millennial Media's mobile advertising network, according to its latest monthly report. Android's mobile operating system has seen rapid gains over the course of 2010, and has increased its ad requests by 2182% since January, growing at a rate of 65% month-over-month. Android now has a 37% impression share, as does Apple's iOS, says Millennial Media. Sponsor According to the new data, Apple is still the leading device on Millennial's network, representing 25% of the top 15 manufacturers by impression share during the month of October.