hey, ive setup my computer with linux and moved it downstairs so it can stay on 24/7 so youve got another build server if u want it (celly 2.4ghz, 512mb ram), the only downside is that my uploads are capped to about 20KB/s so uploading the 2mb zip actually takes longer than compiling...
so, my suggestion (also happens to decrease your bandwidth usage also) is to strip the non-comiled stuff into a seperate zip for all targets.. (fonts, docs, wps, cfg, etc). removing this from the build dropped 1mb off the zip size... which would work out a fairly big bandwidth saving for everyone seen as these dont really need to be updated frequently... (actally english.lang prob would need to be in the zip...)
