This demo looks very interesting. MBoxMail is an iPhone app that allows you to access your HotMail (Live Mail) account on the iPhone.
The most exciting part about this application is that it supports synchronization between the view of your hotmail account on your phone and the view of your account via the HotMail page. (Unlike the POP3 access method that I blogged about previously, where when you read or delete mail from your iPhone - the changes are not reflected on the web page).
I haven't yet had a chance to test this application as it is not yet available in the Apple iPhone App Store. I am definitely waiting to test it out.