I would like to second Peter's recommendation for SLA and the value proposition they bring. CS3 is a founding member in SLAA, the originating organization are forever fans.
I would also suggest the Information Technology Alliance for your consideration as well. The ITA is an organization founded on the principle that knowledge shared is knowledge increased. We are an organization comprised of value added resellers from across the entire community. We have members who carry products from Sage, Microsoft, IntAcct, SAP, NetSuite, Adaptive Planning, SugarCRM, and many others. This cross-market interaction gives you the opportunity to not only commune with fellow Sage partners but also gain insights into challenges and opportunities from the other side where you can get a better understanding of the quality of the grass over there before you leap that fence.
Meetings are held at sites that offer opportunities to rest and relax or challenge your adventurous side; however the spirit may move you.
If you have any questions or want additional information, don't hesitate to reach out and give me a call.