Amazon puts limits on 3G web browsing

The Digital Reader reports that Amazon has imposed a 50MB/month limit on web browsing over 3G on older Kindle eReaders. (The current Kindle Touch doesn't allow web browsing over 3G at all.) There's no limit on bandwidth use over Wi-Fi. Once the 50MB limit is reached, the 3G connection only works for visiting Amazon.com, the Kindle Store and Wikipedia.