found a knowledge base article at palm.com regarding set up for hotmail access on the treo 700wx
Set up a Pocket MSN account (Hotmail & more)
Pocket MSN gives you access to many features in your MSN account, including:
- <LI class=items>Hotmail: read, write, send, delete <LI class=items>MSN Messenger: exchange messages, see who's online
- Customize your Pocket MSN experience
Don't have an MSN account yet? Use your desktop PC browser to visit
www.hotmail.com or
www.passport.com.
Set up your Pocket MSN account (including Hotmail) - Press Start
and select Pocket MSN. - On the Pocket MSN screen, select MSN Mobile Home.
- Select Sign In. You may be asked whether you want to proceed; select Yes.
- Enter your MSN, Microsoft Passport Network or Hotmail email address and password.
- Scroll down to the options Then select Sign In.
Sign into Pocket MSN (to check Hotmail, MSN Messenger, and more)
Any time you want to log into your Pocket MSN account simply press Start

and select
Pocket MSN.
dont know if this is what your looking for or not.