This project will bring Microsoft Exchange email access to the iPhone without the use of IMAP (which many companies will not enable on their servers) or 3rd party websites. It uses a simple Python script that logs into Outlook Web Access and screen-scrapes the content. The screen-scraped emails are then served up to the iPhone email client via a local ‘fake’ POP3 server.

http://code.google.com/p/iphone-pop3-outlook/