Guh. It's a long story. I'll fix it.

Basically, 44300 is the default IIS Express SSL port. It was changed to 443 because I've got my local box set up to use nuget-dev.localtest.me as the domain name (something I suggest everyone else does too) and was actually serving up the gallery from ports 80 and 443. Not related to this change, it can totally be run over port 44300.