Hi Mat,
great that you take on that endeavour. You might want to take a look at mailing-lists in contrib. This contains a some additional procedures for sending mail in tcl/email-procs.tcl like handling multipart emails, alternative, encoding and all the other nice things that the current acs-mail-lite is missing.
The reason for writing this in a seperate package was our wish not to put too many parameters into the acs-mail-lite package as well as to have the flexibility to replace system variables in emails in a consistent way (just take a look, and you will see what I mean by that).
This should give you quite a jump start and it is already tested and working in client installation.
What would be intersting according to Timo, if you could add a switch for sending CR items to the send function. Meaning: You give it the normal parameters as always and add a switch like "files" to it, that contains a list of CR_item_id's of items to be included in the mail.
