Also, wouldn't you want the explore search bar: http://posterous.com/explore/
to look like this one: http://posterous.com/explore/?search=garry
Finally, on the explore page I think it'd be cool to have a running sidebar of the most recently updated posterouees (sp?).
For the homepage, one thing we obsess about is keeping the choices dead simple obvious. (see tyranny of choice problem) We want people to try posterous, and I'd be worried a search box would be pretty distracting.
But the rest makes a ton of sense.
Also, wouldn't you want the explore search bar: http://posterous.com/explore/
to look like this one: http://posterous.com/explore/?search=garry
Finally, on the explore page I think it'd be cool to have a running sidebar of the most recently updated posterouees (sp?).