I currently have a windows mobile phone (HTC Snap) synced with outlook and my office and it works very well. everything is over the air and i have complete access to my calendar, office directory etc. but the thing i like the best is i can shut off direct push when i go home or on the weekend and the emails wont be pushed to the phone until i turn it back on in the morning. Great feature if you ask me.
would i have to do this everytime I turn them on and off?
I'm assuming there is no direct on/off option
Unless someone has created an app, I've not heard of one. You could put Options on a Convenience Key to toggle and enable the firewall with a couple of clicks.
Posted from my CrackBerry at wapforums.crackberry.com
Another option would be to create a seperate profile that does not alert you in any way to arriving emails to a certain account. While the emails would still be delivered, at least you would not be bothered by your phone buzzing at you all weekend for work email.