I have managed to get the G1 to download emails from my Hotmail account (something that a lot of people are having trouble doing I understand). I have been informed that these settings will work in the UK and most of Europe but I cant verify if it works elsewhere. Maybe you will have to set your locale on the hotmail webpage to UK to get it working.
Anyway here are the POP3 and SMTP settings for hotmail using the email app supplied on the device. I have tried and been able to read from my hotmail account.
POP server: pop3.live.com
Authentication type: SSL
User name: Your Windows Live ID, for example
yourname@hotmail.com
Password: The password you usually use to sign in to Hotmail or Windows Live
SMTP server: smtp.live.com
Autentication type: use TLS
edit: these settings now work when forwarding mail to your gmail account