Pianobooster 0.6.4b (.tar.gz sourceforge download) builds and runs okay on ubuntu 10.10 RC. I posted a method to test the build and operation from a USB drive:
wiki:Building_from_SourceI need to test the script described on that page some more, as some tools (e.g. wget) seems to operate slightly different between 10.10 and 10.04. But it generally should run on various releases (9.10, 10.04, 10.10).
I'm not too familiar with the debian/Ubuntu package process, but I gather that 'ppa:racb/extra' needs to have a new entry for release 10.10 pointing to 0.6.4b. Not sure how to help with that.