Exchange e mail fix, kindof
You may know this, but you can download K9 e mail client and it will solve all of those problems. You can run G Mail, exhange, Yahoo all on K9 with no problems.
It is not a perfect solution since you still do not have access to your corporate to do list and calendar, but it might work for you for now.
Epic with Launcherpro Plus and over 150 apps