Since hotlist is one of the things that you can rcv as email, using one of TDs overall strengths - customization - having more options for hotlist criteria would be quite useful and hopefully quick/easy for TD to implement. I'd really appreciate a more flexible "hotlist query" so that AND, OR etc. would be operators.
Perhaps ideal (in terms of flexibility) would be that user could do any advanced search they wanted. When this is saved and named Hotlist, this would automatically be the settings used in your account settings area.