Getters may be called lots of times, not only in the render response lifecycle.
Ths means that you should be calling DOA's etc in your getters. Seam has the very useful @Create annotations for initializing data.
Google for this and you will find a lot of useful information, also look in this and the myfaces forum.
Typo, meant that you shouldn't be calling DAO's or anything expensive in getters :)