[@ipstenu Moderator 15 years, 9 months ago]

WP has, built in, a one-click updater for themes, plugins and the core. If you’re on WP 2.7 or 2.8, you don’t need a plugin at all. You can search for and download themes and plugins from the admin interface.

Like as not, this functionality will eventually be included with BB, but it’s probably low on the list.