The president of our indy firm has had great success with his Charitable Gifting Strategy.  I think its safe to say that every charity within a 200 mile radius of our office will be thriving for decades.

I personally haven't proactively conducted seminars or approached organizations on this strategy (only to my current clients), and as a Canadian I don't know all of the details on Tax and Retirement planning in the US, but from the prospecting side it DOES work.