apt sources?

[Jim Cheetham]

I forced an install of a release CD over the top of my preview-upgraded 
machine yesterday, for reasons that are open to criticism :-)

However, today I noticed that my apt-sources file has been reset to 
cover only the CDROM. I guess this is because I didn't ask the installer 
to set up my network sources - I didn't do that step at all, I ran as 
custom-expert and went straight to install base system (after mounting 
disks), and then finished.

That's not a big problem, and I don't think the installer should have 
"done the right thing" ... but ... I can't remember what the correct 
apt/sources.list stanzas are.

I can see in the wiki how to add universe :-) but what about warty and 
security? Can someone post a working sources.list, please?

Also, is there an alias to "current" in the same vein as Debian's 
"stable -> woody" setup?

-jim