Don't slow down now, designers!
You have all presented some very good ideas but we are still looking for more.
From what we have seen, we are now open to other approaches that suggest growth, that highlight our full name "The Center for Association Growth", that subtly incorporates "TCAG" into the design, and for now, does not need to have our slogan "Grow with us."
One more thing to consider... a lot of our success in helping association grows is in our expert use of technology for our association clients. So, while different from our current logo, we would also be interested in designs that had a more Web 2.0 approach.
Hope this helps.