Hi. I have built debian packages with the 5.08 betas. To use them, add the 
following line to your /etc/apt/sources.list:

deb http://felipe.sateler.com/debian unstable main
deb-src http://felipe.sateler.com/debian unstable main

The first one will give you the binary packages (available for i386 and amd64) 
and the second one the source package.

The archive is signed with the key 54191ABE, available at 
http://felipe.sateler.com/debian/public_key.asc
With fingerprint BB00 940D 4500 DA79 827B  6F30 9841 F4B0 5419 1ABE

Alternatively you can download each of the files by themselves at 
http://felipe.sateler.com/debian/pool/main/c/csound/

Please test and comment.

This is a list of the current packages with a short description:

 csladspa   - LADSPA plugin for csound
 csound     - powerful and versatile sound synthesis software
 csound-gui - GUI interfaces for csound
 csound-utils - miscellaneous utilities for the csound system
 libcsnd-java - Java bindings for the csound API
 libcsound64-5.1 - main library for csound
 libcsound64-dev - development files for libcsound
 libcsoundac5.1 - the csound Algorithmic Composition library
 liblua5.1-csnd - lua bindings for the csound API
 pd-csound  - csound external for PureData
 python-csound - Python bindings for csound
 python-csoundac - Python bindings for CsoundAC
 tclcsound  - Tcl bindings and interpreters for csound

-- 
Felipe Sateler