This isn't actually a plugin, but didn't know where else to put it.
I was inspired by Stevens new Last.fm plugin and wanted to make something that updates by itself. I made this web page that uses the playing track to search last.fm for top artist tracks, related artists and similar tracks. Clicking on an entry will locate it in the library if it exist.
To use it just paste this link into the displayed tabs:http://lastfm.host-ed.me/?&artist=
Optional extra parameters:
number=x how many results you want to show (default = 5)
bg=xxxxxx html color code of page background (without the #)
font=xxxxxx html color code of font and links
hover=xxxxxx html color code of hover bg
last=1 Show last.fm icon with link for each entry
spot=1 Show spotify icon with link for each entry found (slows down the page a bit)
I put it up on a free host, so if it goes down it probably exceeded the traffic limit.
Looks like this so far: