I think it's safe to say that mobile technology is going to have a profound impact on marketing (if it hasn't already)!!

Here's some of the latest information I can find on consumers and their use of mobile phones and mobile technology:

• Smartphones make up 31% of all U.S. mobile subscribers
• Almost 50% of 18-34 year olds use their mobile device to purchase products or services
• Here's some top brands using QR Codes: Starbucks, GMC, Google, Weather Channel, Best Buy, Ford, Pepsi and Facebook
• 1 in 3 mobile device users have scanned a QR Code
• Almost 2 in 3 who have scanned a QR Code have done so multiple times
• 35-44 year olds do the most mobile barcode scanning in the U.S

This data is from multiple sources - here's the aggregator if you're interested in seeing more.