WordPress Plug-In of the Day #0019
Title: Sidebar Login
Author: Blue Anvil
From the author:
Sidebar-Login has both a widget and a template tag to allow you to have a login form in the sidebar of your wordpress powered blog.
It lets users login, and then redirects them back to the page they logged in from rather than the backend, it also shows error messages.
You can configure the plugin in
Admin > Tools > Sidebar Login after installing it.