I finished both slippers and straps, felted them, dried them (took a long time to dry), and then left the pieces on the counter. For a month.
This evening I purchased the buttons and sewed the straps onto the shoes. Finally. Finished.
I thought I would count these as a 2010 finished object, but come on. I left the last little, tiny bit of work until February. I think I had better call them 2011.