Yitz at the Heichal HaNegina in Yerushalayim has this post on Akadamus.
Chaim Shulman’s Internet Parsha Sheet has some great stuff as usual.
Rabbi Brody has a good post on Converts and Moshiach.
Rabbi Josh Flug from YU Torah on the Minhag of Eating Dairy Products on Shavuos.
Over at Aish:
Beyond BT contributor Yaakov Astor writes about Soaring to Freedom.
Batsheva Hirschman Frankel has an old classic Shavuos and the Grateful Dead.
Rebbetzin Heller on G-ds Words – The First Two Statements of the Ten Commandments.
Chabad.org Shavuos posts here.
Thank you very much for the link!
Batsheva Hirschman Frankel — any relation to Mark Frankel?
We probably missed a few others as well, but we just added your suggestion.
You forgot http://www.chabad.org/holidays/shavuot/default.asp