So I decided to write a simple product backed by NLTK (Python's natural language processing toolkit) that would do something a lot like Fantastical for OS X - given a message body, try to figure out the when and where, and add it to a calendar.
The product is still in early beta, but I'm looking for testers to help vet the parsing algorithm with real world conversations. I've been using it for about a week for all my scheduling, and so far it's worked great :-)