Maybe also a weekly interview with one forum member, although this ma be a bit more difficult for privacy reasons, users may not want to go through the stress of ensuring no one can trace their identity through such means.
Weekly awards for best posts, worst posts etc could also be cool.
Interviews will be a nice idea, and expression of the forum's interest should be a priority when such a channel is made available.
Awards will bring more creativity, as been the face of bitcointalk.org for having a reward for a well-articulated post of the week will be an honour to the winner.