[skarin]

I've been playing with this today as well. As far as I can tell it's a random 11 char string. My assumption is that that it is the unique key used to identify that object in the "database". I successfully created a new inbox task on my device by creating the proper files on my windows box and dropping them in my WebDav folder. So far I am keeping it simple and creating a windows app that acts as a "Quick Add" for creating a new item with a note in the inbox. I then go in and sort my inbox on my iPhone. Works pretty well so far.

Let me know if you come up with anything interesting yourself!