I just rolled out a couple of quick changes to Amidst. The first is that your activity now shows up in your “Recent Activity” stream, along with that of your friends. Previously, it had just shown what your friends were doing. This brings things in line with what people have come to expect from services such as Twitter, and adds some context as to when things happened.
The second change is that the default location in the search box is now determined by Google the first time you use it. This is thanks to the handy ClientLocation object provided by the Google AJAX Loader, and should be accurate enough for your first location-centered search to work.