Sad news for global freeloaders travellers looking to keep up with Gmail and Twitter on their Amazon e-reader. The online book seller has started closing in on excessive free web browsing, policing a 50MB data limit on its keyboard Kindle iterations. According to users on MobileRead, you'll still be able to browse Amazon's Kindle store and Wikipedia, but anything beyond that gets locked down. After some further investigation, it looks like Amazon added a provision outlining the data limits on its site, dated around July 1st. It stipulating that users "may be limited to 50MB of browsing over 3G per month." The data cap only applies to older Kindle versions, including the Kindle Keyboard and Kindle DX. If you've got Amazon's latest e-reader hardware, then you're not missing anything -- the free web browsing option was sidestepped on the likes of the Kindle Touch.