TwitterFon, a Twitter client for the iPhone and iPod Touch now supports saving links to Read It Later. RIL is supported in both the free and pro versions of TwitterFon 2.0. Note: at the time of this post TwitterFon Pro is still pending in the review process.
While viewing a tweet, it just takes two quick taps to save page to your list.
TwitterFon 2.0 also brings a number of new features including video uploading, in-app maps, in-app mail, in-app YouTube, and a speedier interface.
For other ways to save from Twitter: Other integrated apps and saving links from Twitter
Read It Later API
TwitterFon makes use of Read It Later’s Open API that lets any developer make Read It Later applications.