I therefore wrote a bash shell script that leeches the three most popular tags for a given band name and applied them to the track. I can then just have iTunes use these tags for the entire album.
Here is the script code:
#!/bin/bash
TAGS="extract.txt"
TITLE=`exec osascript <<EOF
tell application "iTunes"
get artist of current track
--set genre of current track to "HORSE POP"
end tell`
echo "Fetching tags for: " $TITLE
wget -q http://last.fm/music/$TITLE/+tags
sed -n 's/rel="tag"//p' +tags >gt;>gt; $TAGS
TAGLIST=`awk '{print $4,$6,$7,$8,$9,$10}' $TAGS |sort -r|head -3|sed 's/.*" >gt;//g'|sed 's/</a>gt;//g'`
TAGLIST=`echo $TAGLIST|sed '/SCENE.*[^.]$/N;s/n */ /'`
echo $TAGLIST >gt; $TAGS
echo "Setting tags to :" $TAGLIST
NEWTAGS=`exec osascript <</EOF
set tags to do shell script "cat extract.txt"
tell application "iTunes"
set genre of current track to tags
end tell`
rm +tags
rm $TAGS[crarko adds: I haven't tested this one. Anybody want to modify it to work with Pandora?]

