TOPIC: Replacement for evite?

I really like what I see here with DT Register. I look forward to starting to use it soon.

evite is a popular tool for registering for more informal gatherings, which is my use model. However, evite has some major drawbacks.

A few of the nice features of evite that do not appear to be available in DT Register are:
+ Yes, No, and Maybe options for registration
+ Ability to send email to just the \"YES\" or \"YES and MAYBE\" or to those users who have not responded at all
+ Ability to show or hide from users who has registered

Any thoughts on whether this can be done?

Thanks so much.