Hrm, you've just inspired me to add something like this to a socketbot i have.
Thanks. Yep, first come first serve. To append data, i'd say you'd need to have it take what's there already, and (if you use mine) addon to the nth line of text. Infobot use to have this "is also" trigger which if said would append the data to the already existing data.
<nick> cow tipping is fun
<nick> cow tipping is also a way to be mean to cows
<nick> cow tipping
<bot> hmm, cow tipping is fun or a way to be mean to cows