A couple of weeks back, I posted statistics showing the increased usage of the mobile web. Well, the numbers for smartphones sold in Q4 2009 have been reported, and they can be some summarized in one word – impressive!

The consensus for number of smartphones sold worldwide last quarter was between 50 and 55 million, a 30% year-over-year increase compared to the same period in 2008. For the year, smartphones sold totaled approximately 174 million units, a 15% increase from 2008. What is most impressive is that this is all happening in a down economy, when people should be spending less, not more, on mobile handsets!

Even more interesting, this week at the MWC in Barcelona, Google CEO Eric Schmidt reported that 60,000 Android-based handsets are being sold per day. Pretty amazing, until you consider that based on last quarter’s sales numbers of 8.7 million handsets, Apple sold over 95,000 handsets, per day! Now realize that the two leaders in the samrtphone space, Nokia and RIM, sold 20.8 million and 10.7 million handsets each, and it’s pretty clear that smartphones are flying off the shelves these days!

Given the impressive rise in smartphone sales, it should come as no surprise then that mobile analytics company Bango reported 600% growth in traffic to mobile websites. As more users purchase smartphones and use their smartphone’s web browsing capabilities, increases in mobile web traffic will continue. We’ve seen it on our own client’s mobile websites. Mobile web traffic has been up significantly over the last three months.

The bottom line, it’s time to stop thinking about taking your site mobile and to just do it. Given the increasing usage of the mobile web and the cost of lost business in this economy, you can’t afford not to have a strong mobile web presence, especially given how affordable it is in the overall scheme of your online presence.

Data sources used for this article: Strategy Analytics via IntoMobile, IDC via Mashable, comScore, Canalys