However, the previous official player is deprecated and no longer supported (although it still works) as the Last.fm team has released a new client (in beta stage for GNU/Linux systems). This new client can be downloaded here, but there’s no Debian package, just a precompiled binary in a .tar.bz2 file. Moreover, this binary does not work in sarge, the current stable release of Debian.
As this new client is GPL too (congratulations!) I downloaded the source code and made a Debian package ready to run in sarge systems. You can get it from my webpage. I have been using it successfully for some time, but any comments regarding its packaging are welcome. Enjoy!
Updated 03-12-2006: I also built another package for Debian testing (etch). You can download it from the same page I mentioned above.
Updated 04-12-2006: Now a package for Ubuntu edgy is available too!