Ensembl presents up-to-date sequence data and the best possible annotation for metazoan genomes. Available now arehuman, mouse, rat, fugu, zebrafish, mosquito, Drosophila, C. elegans, and C. briggsae, Others will be added soon.
I am nowhere near capable of understanding the full significance of this, but it does seem monumental to me. I am, at this moment, downloading the 1.2 Gigabytes of flat textfiles containing the human genome.