Trimming the disk usage
/usr/local/bin/via- 9.7M (this was where I downloaded the VIA DRI binaries to, but they've been installed so I can remove them
/usr/X11R6/lib/modules/dri- 24M (but obviously not the VIA driver)
binutils bison flex g++ g++-3.3 gcc gcc-3.3 gcc-3.3-base kernel-source-2.6.8 linux-kernel-headers makethrough apt-get will free another 60Mb or so. Best to do this before deleting the above files, in case any dependencies get mucked up.
This will be entirely offset by the installation of the Java 1.5 Runtime Environment, which I'm considering installing... that will weigh in at 91Mb. Ouch. Maybe need to rethink that.