Wow; that's a lot of questions and issues in one thread.
For a "Today" like screen, check out PocketDay (Cross River Systems
) - it is a very nice "dashboard" as your home screen. Mail, missed calls, calendar, stocks, weather all on one page.
There are no e-mail replacements for the standard application.
All messages *always* appear in the Messages folder. There is no way to seperate out the corporate messages. Sorry.
I would make sure you are running the latest handheld operating system on the 7250; that's a older model when compared to the 87xx and 81xx models, so it may not be current. Go to Options / About to see what version you are running, and check with your carrier's BB support web site to see what is available.
Good luck and welcome!