There's Fluxxentration: http://wunderland.com/LooneyLabs/Fluxx/Fluxxentration/Index.html
You could turn Nano into a solitaire writing game. Draw a set of cards and then you have to write a short story based on the elements. (Or, to make it really challenging, write an actual 55-word nanofiction story -
On 6/25/07, Kimberly Terrill
LOL... true... Nanofictionary isn't very condusive to solitaire....LOL.
I think I'll just master the ones I already have for now.....