This sounds good. Is there any way to determine which of the 10 pieces were used for the recovery when the bitcoins are spent? Ideally I'd like a solution where I can set 1 key that can be used to spend them, and another 3 keys, two of which need to be used together to spend them, and I'd like it to be determinable from the blockchain which of the keys were used to spend them. Is this possible?
There will be plenty of options once all of the features have been implemented. Not sure of yours exactly, But I'm sure you'll find something that works for you.
Check out this thread
https://bitcointalk.org/index.php?topic=139625.0