I think SEAM is getting better and better, which became a challenge for other big competitors in this area.
Moreover, lot of people started getting around Seam for their projects.
In order to help people to increase knowledge with Seam, i planned to post some of my Seam bookmarks.
Here it goes:
Official Seam Wiki: (First place to start with)
This is always updated. So please try to keep watching this.
Next important link is Seam FAQ:
Here are some of well-known Seam articles/tutorials
Very good article with Sample application on Seam+JPA
Pagination with Seam+EJB3+Hibernate
Advanced Image handling in Seam (Step-by-Step Five parts tutorial)
A seven part step-by-step tutorial
Technical article on Seam (with comprehensive screenshot/source codes explained)