a few web services i use in opera search:
discogs Artist Album
http://www.discogs.com/search?type=all&q=$replace(%artist%, ,+)&btn=Search
http://www.discogs.com/search?type=releases&q=$replace(%album%, ,+)&btn=Search
musicbrainz Artist Album
http://musicbrainz.org/search/textsearch.html?query=$replace(%artist%, ,+)&type=artist&an=1&as=1&aa=1&limit=100&handlearguments=1
http://musicbrainz.org/search/textsearch.html?query=$replace(%album%, ,+)&type=release&an=1&as=1&limit=100&handlearguments=1
kompaktkiste Artist
http://www.google.com/search?as_q=$replace(%artist%, ,+)&as_sitesearch=www.kompaktkiste.de&safe=off&num=100
sternsmusic Artist
http://www.sternsmusic.com/search_results.php?search=Artist&prmm=$replace(%artist%, ,+)&dvd=on&music=on&video=on&book=checkbox
imdb Album
http://www.imdb.com/find?q=$replace(%album%, ,+)