It seems that there are 4 ways that the community can help to increase traffic to the BETA program, which is a key priority for the dev team:
a) Add a beta section to the community; at the top level of navigation - preferably with some kind of a highlight so that people's eyes are drawn to it when there is new content
b) Reward people for participating in the BETA; adding suggestions; and logging defects in the BETA - with badges and highlights in the community news
c) Advertise the beta. We can tell people about it with splashes on the front page; notes in the community news etc
d) Outreach to members of the community who are posting issues etc.
This would be a way to make use of the power of the community to make each BETA better.
cc: @TreyW