From the Economist magazine, scientists have created a new base pair, S-Y, to combine with A-T and G-C. This new codon can result in entirely new proteins not found in nature -- and new forms of life. DNA gets an ugrade?
From the article:
"But if the new S-Y pair turns out to work as well as the two existing ones, the capacity of the genetic code would more than triple. The new bases mean that there would be 216 possible codons-in other words, 152 entirely new codons up for grabs. Each of these could be linked to a new, unnatural amino acid, which could then be slipped into living cells and incorporated into never-before-seen proteins."

from http://futurescan.blogspot.com/