Well, it all really depends on what type of computer you're running. I did it on a 800mhz with 256mb of ram and it took me about 2 days. On my newer computer which has 2.0ghz and 2gb of ram it took about 1 day. Really the only big ones that take forever are GCC, binutils and glibc. The rest only takes a couple of minutes. Also it depends on how you actually do the compilation. It's faster(usually) to do it on an existing Linux system than the LiveCD, but the LiveCD will produce a completely independent system no matter what. Sometimes there are troubles with doing it in an existing Distro. But, GOOD LUCK!!