RE: Want a fun summer sling to spice up my collection
I think you need a MeiTei since you already have everything else :) O love http://www.babyhawk.com/ . They are very comfortable, well made, and the fabric selection is awesome. You should also check out http://www.freehandbaby.com/ These have a smaller body so they're great for a hot summer. And of course there is http://www.kozycarrier.homestead.com/ . They only have a two week turnaround now according to the website. I've also heard good things about http://www.attachedtot.com/ but I have never seen them IRL.
A gauze wrap is really nice to have especially since you are experienced in wrapping. I wore mine all over Disney when Noah was almost two and I never felt strained. Here are a few links http://www.gypsymama.com/shop/breeze.htm , http://www.calinbleu.com/
Also, the Ellaroo is a really nice, lightweight wrap for summer. They're pretty inexpensive and they have some new prints that are really pretty. http://www.ellaroo.com/fabrics.html
DS 10, 5th grade
DD 8, 3rd grade