Seems that there's a lot of advocacy groups out there that may be steered by other agendas (hint: rooftop owners). Below is the link for an advocacy group that supports what the Cubs are trying to do with Wrigley Field and the surrounding neighborhood. I'm assuming that they're mostly looking for local residents, but I'm sure they wouldn't mind the support from those outside the neighborhood as well.
We've said a lot on this board in support of what the Cubs are trying to do, but this allows us to speak as a unified voice to the politicians that are currently holding up the approval. I'd encourage everyone to join and contribute, rather than stay on the sidelines.
Here's the link for the group website: