This project is now defunct
HTTPMail is a project to document the HTTPMail protocol used for Hotmail. It also aims to allow other mail clients to use Hotmail. The first way this is done is with an HTTPMail/POP3 proxy server written in Perl. You can connect to the proxy server with POP3 and check your Hotmail account. There are also versions for Ruby (the one I personally use, therefore the one most up to date), a start of a JavaMail provider, and a VB control that was donated to me.
Sourceforge Project Page
JHTTPMail - A JavaMail provider based on HTTPMail
HTTPMail Plugin - HTTPMail plugin for Mail.app
MSNj - An MSN Messenger library for Java.
JMSN - A GUI application and developer library. Pretty much a duplication of effort of MSNj, but hey.
Contact the author: Dave Dunkin
For consulting related to this or web design and hosting in Bellingham, WA and Whatcom County, see Gottathink