baabullah

This is a widget, you can put in the sidebar that display recent played tracks of an last.fm account.
You can set any last.fm username, limit the songs and refresh interval.
This plugin require jQuery on your template. If your template doesn’t support jQuery, this plugin will display your currently played song in image format.

LastFM Now Playing

A widget that display recent tracks of an last.fm account.

j.org

This plugin adds a sidebar-widget to list an artists upcoming shows or top tracks from Last.FM (using the new 2.0 REST API).
This plugin requires PHP 5.
Current features:
<ul>
<li>event listing</li>
<li>top track listing</li>
<li>multi-widgets (add arbitrarily many widget instances to your sidebar)</li>
<li>comes with many pre-defined widget layouts</li>
<li>complete customization of widget layout possible via format strings and tags</li>
<li>I18n available: English, German, Russian. Add your own!</li>
</ul>
Please let me know about bugs and improper translations you may encounter.
<ul>
<li><a href="http://www.brain-jek.de/wordpress/lastfm-for-artists/" title="Plugin Website" rel="nofollow ugc">documentation</a> 
The format of dates and times are part of the translation files. Let me know if this should be another user-editable option.</li>
</ul>

Last.fm For Artists

This plugin adds a fully customizable sidebar-widget to list an artists upcoming shows or top tracks from Last.FM (using the new 2.0 REST API).

LastFM Now Playing vs Last.fm For Artists