This is definitely not a new idea but one that is really important! Please Please resolve the issue of recording history when an email is sent from Secondary Contacts. Really thought this might have been top of the list for 2011.
Act does some really amazing things but surely this just basic? Why should we clutter up our contacts layout with 2nd email and 3rd email fields and/or create new contact records for just secondary email when there is a tab for it in the layout already but it doesn't work in what should a "blindingly obvious" way!
If it can be sorted there will be loads of happy people out here!!!