I'll add my voice to this.
Libre.fm scrobbling would be great.
By the way...
If you want to download all your scrobbles from Last.fm and upload them to Libre.fm, LastScrape GUI
works really well.
Once that is done, you can go to your Libre.fm profile and click on Edit > Connections to other services > Connect to a Last.fm account. Your scrobbles will then be forwarded.
One other thing. Some time ago when Last.fm updated their website, they removed RSS Feeds. I found RSS Feeds to be very handy, especially when using Firefox as I add it to me Live Bookmarks and can quickly see what I have been playing recently. You can still use RSS Feeds by reading xiffy's Last.fm RSS Feeds Blog