Hey there...this is a *great * service! I am surprised you are not getting more of a response. You could definitely use an overhaul to make it a bit more user friendly..not that it's too hard but if you've never seen a "sell order" page it can look intimidating.
Would love see a cash in the mail service but I wouldn't envy anyone having to arbitrate disputes on that one...impossible! "I sent it!" "I never received it!". Okkkkkk.
You could however add moneygram and western union easily as both of those involve receipts. Hope that you do. Many people do not have one of these banks near them but everyone has access to WU and moneygram.
cb