Noopsi can pick dates out of entries/items. This will allow you to assign deadlines to certain items and entries which can then be exported to a calendar using an iCalendar or RSS feed.

Supported Date Formats

Explicit dates such as: "September 27, 2008," "Dec. 2nd," "the twentieth of june," and "Oct 31st at 7pm."

Implied dates such as: "next thursday," "this january," and "tomorrow."

Recurring dates such as: "every dec. 24," "every tuesday," and "the first of every month."