Between a bundle of letters my maternal grandparents kept, and some recordings my maternal grandfather, and both paternal grandparents made, I have plenty of material to transcribe. I am also constantly finding more material - such as newspaper articles - online.
I post some of my transcriptions on Monday mornings on my blog at TransylvanianDutch, referring to it as Amanuensis Monday.
I photographed several hundred family letters that my aunt and grandmother donation to the University of Michigan back in the 1960's. I have been transcribing them on my blog, Apple's Tree for over a year, with no end in sight. My great-grandfathers letters were separated from the collection and donated to a different library and I have plans the obtain them also.
I hope to transcribe several other documents and family papers as part of Amanuensis Monday's.