Ubuntu Brainstorm? Server software suggestions please!

[wubrgamer]

I'd like to find a similar sort of software, not ideatorrent, because that would require a full installation of drupal, but some very simple software for users to submit/vote on ideas/proposals for a semi-democratic committee that I'm on. I'd like to enable the people whom this committee serves to have a direct say and to be able to directly interact with the committee. They are allowed to come to meetings but as it is a monthly inter-state affair often requiring a lot of driving and time this would allow them to have their voices heard without physically attending the meetings.

Thanks!

(I'd really like to find something lighter weight than a full Drupal installation, I've had issues dealing with Drupal before!)