At this time of year we apple nuts are looking at different scion wood to graft this spring. I wanted to mention Hocking Hills Orchard as a source of unusual and heirloom varieties. I had good luck with the scions I bought from Derek last year and plan on obtaining more scions from him this spring. Contact him via email and he will send you a list of available scionwood. This years list numbers over 700 varieties.
http://www.fourseasonscabinrental.com/hockinghillsorchard.html