Hey! I'm glad you're so interested in Tri Delta . . . I just wish I could help you more. I've yet to write a rec or even point somebody in the direction of one. Here's the website of the Atlanta Alumnae Panhellenic:
http://www.atlantapanhellenic.org/
and here's the Atlanta Tri Delta Alum Association:
http://www.atlantatrideltas.com/
Hopefully you can email one site or the other for more information and they can hook you up with somebody who can meet you and write you a recommendation. I hope you get your recs! You're lucky that you live in a city with so many Greek women; it will make getting recommendations a little bit easier. Good luck with rush and make sure to let us know how it goes.