It's been evident for sometime that the Randi challenge is severely criticized and a big irritation in general by the New Age community and it's sympathizers. So I gathered some others that are not associated with the MDC. As far as I know no one has won any prize money from these other challenges either.
http://skepp.be/nieuws/facilitated-comm ... fabricated
http://fayfreethinkers.com/
http://www.skepsis.fi/haaste/
http://www.tonyyouens.com/challenge.htm
http://www.aske-skeptics.org.uk/
http://www.sceptiques.qc.ca/activites/defi
http://www.tampabayskeptics.org/challenges.html
http://rationalistprabir.bravehost.com/
http://www.ntskeptics.org/challenge/challenge.htm
http://www.iigwest.org/challenge.html
http://www.skeptics.com.au/features/prize/
There's even a person in China offering an award no site though. 1,000,000 Yuan prize in China offered by Sima Nan
A Wikipedia search will bring up others not listed above.
Good Luck.