Android :: Touchdown & Native Exchange Sync?

Say you are in your office, sitting at your computer. So you don't need your phone to notify you every time you get an Exchange email, or every time you have an Exchange calendar event, because its all popping up right on your computer screen anyways. But you do still want to receive notifications for your non-Exchange email accounts and calendar events (e.g., Gmail).

Can Touchdown be closed or "turned off" (or maybe just killed using a task killer) while you are at work, so you do not receive notifications about Exchange emails and calendars, but you do still receive notifications for all your other accounts? And then as soon as you leave the office you can just re-load Touchdown so that you start getting phone notifications again for your Exchange account?

Is there an easy way to accomplish this without using Touchdown if you are using just the native Exchange ActiveSync built into Android (sense UI)?

I hate getting notifications on my phone 2 seconds after I've received them in the Outlook on my work computer, so this is why I ask these questions. With BlackBerry (what I currently have, but I want to switch to HTC Incredible) it is easy to manage notifications this way, but I'm curious if I can do it on Android.