Reports on ultrafast DNA sequencing. High cost of a high-quality human genome sequence; Announcement by 454 Life Sciences (Branford, CT, USA) of the resequencing of 30,000-base-pair adenovirus genome in a single day; Focus on technologies for genotyping or reseauencing specific areas of the genome to detect single nucleotide polymorphisms (SNPs); Success of 454's resequencing adenovirus making it leader in ultrafast DNA sequencing; Market barriers questioning feasibility.