Here is a page that has some nice features located at
I believe that the features would be:
1) A guest invite system.
send mail to a list of members (or other who are not
members but who are on an email list).
2) Guest replies: asking guests to answer whether they
will attend or not. With comment area and based on
logged in member. (forces others go join... option)
3) Check guest replies, how many are coming, not
coming, undecided, or not yet replied... option to be
in public view or not.
4) Choice to invite more people.
I think these types of features would complement this
Thanks for your time!