If you don't get a definite answer here, you might ask in the Fruit & Orchards forum. Can you take a larger, clearer picture of the pit? They can also advise about pruning off the dead branches and evaluating what's left of the tree. http://forums2.gardenweb.com/forums/fruit/ Was the fruit soft when you tasted it? If not, it probably wasn't ripe yet. There are some plums which are green when ripe, but it's not a common color for ripe fruit.

Wow, thank you for the reponses although I'm quite unhappy after reading them. I suppose it serves me right for trying to take care of a plant without having the proper identification so I can understand its needs. I'll get it under some more light, and try to remove the damaged parts. Thanks again, Jim

Sorry don't know the exact name, but its an Echeveria

Thanks esh ga, I will tell my neighbor the correct name, he isnt into plants. He has offered me what ever I want of them so will take a few and put in a obscure place to let them grow. Thanks for your info again.