Which Linux OS on Athlon amd64, to comfortably run R?

One oddity about Ubuntu is that there are no CRAN builds for 64bit.

Volunteers would be welcomed with open arms.

I don't think I know enough to volunteer (but I am open to suggestion  
off list), but I had no difficulty installing R from source on a 64  
bit Ubuntu machine (7.10, with, I believe, 1 GB of RAM) following the  
instructions in R-admin. I just kept installing necessary libraries  
until ./configure completed without errors. Then make, make check,  
and make install ran without a hitch.

Kevin

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Kevin M. Middleton
Department of Biology
California State University San Bernardino
5500 University Parkway
San Bernardino CA 92507