I found a work around that so far works for me. This is what I've done.
First, my story. My work email uses Groupwise and BES so the Pre can't get to their servers. The Auto-Forward will only send them as .eml and that doesn't work with my hosted exchange account and/or my gmail account as the pre can't open the email. This is what I did today and so far it works.
1) My work email is automatically forwarded to my hosted exchange account. Mail2web to be exact.
2) My home computer's outlook (2007) is set up to sync with my Mail2Web account. When I get a work email, it finds its way to my desktop.
3) From there, I have my outlook configured to "redirect" those particular emails to my gmail account.
4) It ends up on my phone, and I can read it! Also works with word doc attachments too.
This is a half *** method to make this work, and it costs $$$ for the hosted exchange account, but now I'll finally be able to read my emails throughout the day :-) I just have to leave the desktop on lol.