you cant do it on a stock rom the only roms that ive seen that you have the option to remove these apps are some from the sholes info team and pete had one out also. but for those you have to be rooted and run their custom rom
Download Terminal Emulator
enter the following:
su
mount -o remount,rw -t yaffs2 /dev/block/mtdblock4 /system
cd /system/app
rm com.amazon.mp3.apk
rm CorpCal.apk
mount -o ro,remount -t yaffs2 /dev/block/mtdblock4 /system
I do not know the name of the rest but if you open Astro
On the top next to the Home button hit Up
Now open System
Then app
You will see a list of the apps that are installed in the system. Write the name down and delete the same way as Amazon and CorpCal.
How do you uninstall them. I am currently running Bugless 0.8.3.
Its an android app found in the market.
Both Astro and Terminal
download the app from jack palevich i think you got the one from helloandroid.com
Corporate Calendar is CorpCal.apk
Wonder if Pete renamed it? I am running V6.
Worked for me.