Honestly, I'm still trying to sort this out myself. I think I finally got it, but it took a lot of repeat attempts at the same thing before it finally happened. Let me explain:
I'll start off by saying that if you're a Linux user, this probably isn't for you. I use Windows, so I grabbed TortoiseSVN and installed it. All of the SVN addresses are listed
here by CaveDude, and I tried using them to pull the SVNs. I kept getting repeated "502, bad gateway" errors around 3 PM EDT yesterday for all three of the SVNs. A little while later, I was able to get the EQEmu Code SVN to work, but not the quests or database. Finally, the other two started working. I didn't change much of anything.
So if that's similar to what you're seeing, then at least I'm not alone. If that's nothing like what you've been doing, then hopefully the link above gives you the addresses you needed. If neither, sorry I couldn't help =P