One of my fave social media mentors, Jamie Turner with 60 Second Marketer, shared the following info from a roundtable he attended with Nicole Hall with Mobilize Worldwide 
1) Everyone has an iPhone

• Only about 25% of the populations owns any kind of smart phone
• Blackberry, Android and iPhone are in a dead heat for market share
• Android grabbed 41% of share in the past 6 months, compared with 27% for Apple and 19% for Blackberry

2) You Need an App for That

• With the rise of HTML5 the functionality and feel of mobile website is nearing that of Apps
• You will need an App if you want to take advantage of GPS or augmented reality and a few other features
• If you want to provide consumers with a way to connect with you via mobile, a mobile website is a great alternative

3) Mobile is the Internet, Just Smaller

• People use mobile differently from how they use the internet, for example finding info quickly, comparing prices, making decisions immediately
• People using PC’s are more likely to surf social networking sites and play games
• Search is twice as prevalent on mobile web VS PC
• 1/3 of all searches on mobile are local and 70% of searches lead to action within one month

4)  Mobile is only for BIG Companies

• 75% of all marketers are planning to add mobile to their marketing mix this year….really?
• 3 simple ways to get into mobile: Foursquare, optimize your website for mobile, claim your business on Google

5) Mobile is just for Teenagers

• Average age of a person who sends text messages is 35
• 35 – 44 year olds are the most likely to have downloaded an App in the last 30 days
• Number of baby boomers texting and shopping using their mobile phone doubled between 2007 and 2009