Step 2. Forward all incoming mail to the e-mail given to you by your carrier
Step 3. Now you have e-mail you can check both on your Blackberry and on your computer
You won't have attachments, but you can check your e-mail on any computer. Can you even do that on BES email?
I've never used BES, I don't use BBM or any other blackberry services. That being said, do I have a valid argument?