Hey! I'm an EEB person, too (doesn't seem like there's many of us on this forum).
I also applied to UMichigan and UT-Austin (and a few other schools) and have only heard back from one of the other schools about an interview. That school is a special situation because I visited the campus and unofficially interviewed with someone there this fall. The person I would potentially work with at UT-Austin mentioned that the Ecology faculty usually meet and decide on a weekend to invite potential students to visit. As far as I know, there isn't a way to check online if those two schools have made formal decisions (only if they've received your application materials). I'm assuming they'll either email or call about interviews and admission decisions.
