Can someone poitn me to a good assembly resource?

I am wanting to learn assembly. I have been looking a bit at corewars and I have a VERY old DOS assembly book but that's it and I really want a better resource to learn assembly. www.linuxassembly.org seems to be down and other than that I cna't find too many good resources. I would prefer web resources as with my lnew laptop I won't have spending money for quite a bit of time. If someone could point me to some good resources I would love it. Thanks

--KallDrexx