Press release can be read here. The paper submitted to ApJ can be read here. Edited to add, <a href="http://supernova.lbl.gov/">Also read the Supernova Cosmology Project</a>
thed thanks for posting this and especially for including the link to the preprint so one can go directly to the paper itself and skip the press release it looks as if the percentage estimates of dark matter and energy did not shift significantly but just got more reliable and sharply defined what seems remarkable is that with the prevailing assumption of flatness they have a handle on the "equation-of-state" parameter "w" of dark energy if it has been constant over time they say it is pretty close to -1, which has been assumed by other people but with less confidence in case anyone is curious about w, it being minus one means that the pressure exerted by dark energy equals -1 times it's energy density. w being negative is what makes the pressure negative----which when plugged into the cosmological model (Friedmann equation) accelerates the expansion, so w is a good thing to have an observational grip on glad to see this, appreciate your posting it!