If you guys get a lot of calls and need to remember something (a note) about it. Then the following is perfect for you:
While on a call:
Hit the menu key
Scroll down to NOTES
Type your note
Hit the menu key and "Hide Notes" (If Finished W/ Notes)
To Retrieve Note:
Go to your call log
Highlight the call where you put the note
Hit the menu key
Hit View History
NOTE: Common Sense Suggest That You Type In The Note If You Have The Call On Speaker, Headset or Bluetooth
PS: You Can Also Add Notes To Any of Your PREVIOUS Calls That You Made By Doing The "Retrieve Note" Steps