This article addresses the ways in which JRebel has made an impact on how developers spend their day coding. With JRebel, developers get to see their code changes immediately, fine-tune their code with incremental changes, debug, explore and deploy their code with ease (both locally and remotely), and ultimately spend more time learning and communicating with colleagues instead of waiting for the dreaded application redeploy to finish.
Check out the article here:
http://www.artima.com/articles/coding_with_jrebel.html