They have published a "wish" list of things they wanted in the past. It was mostly office operations stuff, as I recall.
Try here:
http://stamps.org/Mighty-Buck-PurchasesAlso see:
http://stamps.org/Mighty-Buck-ClubHow will the Club support the hobby?
The Mighty Buck Club supports the hobby by building a designated MBC fund, one buck at a time, for providing:
$$ much needed technology, reference literature, and supplies to improve the APS and APRL member services;
$$ subsidy funds for additional education programming when possible;
$$ additional journals for the APRL and member use;
$$ additional resources and equipment for use at APS shows;
$$ supplies to enhance APC visitors' experiences