OK, I just took the time to try Greasemonkey, and it’s cool as I expected. I started fiddling whith some scripts downloaded at the -well made- central greasemonkey scripts repository, and made the following:
- Last.fm with Google
- Last.fm with Amazon
- Last.fm with Allmusic
- Last.fm titles with Google
- Last.fm titles with Allmusic
You may download them on userscripts.org.
I’m quite happy with them now (though Amazon clutters the charts a tad too much IMHO).
Many thanks to kepp for his help in tracking the glitches & providing solutions.