Hm, why did I not see this before I posted.
Can I run Seam in a J2EE 1.4 environment?
Yes, as of Seam 1.1, you can use Seam in any J2EE application server, with one caveat: you will not be able to use EJB 3.0 session beans. However, you can use either Hibernate or JPA for persistence, and you can use Seam JavaBean components instead of session beans.
I guess this answers it then.