That is O.K. man. Well from what I read in the articles about Gmail Sync, Email push is not supported . So, to work around my problem I configured Exchange account as imap , Gmail as Imap and mfe with Gmail to sync Calender and Contacts. Though, after the initial sync , I noticed that the calender in sync but no contacts. So, here is what I did to further try to keep everything in sync , I installed Goolgle calender sync with outlook and and Go Contacts Sync software on my computer . After, that I was able to get me calender and contacts into Gmail . Though, I couldn't get gmail to sync back with the phone just the calender . So, I gave up and synced my contacts using PC suite and left calender sync with gmail using mfe .

So to sum up. Added contacts to outlook will replicate to gmail using Go Contact Sync Mod but can't sync back to N900 only with PC suite , installed Google calender sync on my computer (2 ways ) to replicate exchange calender to Gmail and N900 using mfe .

I am not ready to get rid of this phone yet , I am so attached to it that's why am jumping through hoops. Maybe this won't help you much but regarding Exchange Error with m.google.com try unchecking the email and leave just calender and contacts.