Sualeh Fatehi has written an article on Wicket for devx titled "Get Ready for Wicket 1.4's New Java 5 and Spring Features". He explains how to setup a project for Wicket 1.4-m1, and shows you how to do bleeding edge development with Wicket 1.4 snapshots. The article was probably written a while ago, since Wicket 1.4-rc1 has been out for a while now.
Anyway, it is always great to see people support your labor of work with writing articles about it. Thank you Sualeh for taking the time to write this article! Read Sualeh's article here.