This isn't quite correct - Celera has *not yet* staked a claim. They are busy trying to stake a claim.
Celera Genomics (http://www.celera.com), which is run by Craig Venter, is actually owned by Perkins-Elmer (who happen to make a very popular model of sequencing machine), are trying to sequence the whole human genome before anyone also using a technique called 'whole genome shotgun sequencing'. I won't go into the details of that technique, but basically they're taking a risk that they will be able to assemble a complete genome sequence using this technique - its not proven, but Venter argues that they will achieve unprecedented speed doing it their way.
Craig Venter previously set up TIGR - The Institute for Genomic Research (http://www.tigr.org) - after he fell out with, and left, the US Human Genome Project. TIGR made quite a few strides in sequencing in the early 1990s. Celera seems to be continuing the mission of Celera using other sources of funding (TIGR was a 'non-profit' - it might still be, I'm not sure).
Celera says they will release the complete genetic code that they produce, and not charge people for it (I think this has already happened for some of their data - e.g. Drosphila i.e. fruitfly sequence), but they want to patent all the genes they find.
Arrayed against Celera is a consortium of government-sponsored sequencing centres, with the biggest being the Sanger Centre (http://www.sanger.ac.uk - next door to me as I write this). The Human Genome Project - the result of this collabortion - intends to release all the data it produces into the public domain. The HGP looks like it might win the race on this particular project.
A number of scientists involved in and associated with the HGP consider Celera Genomics to be the devil incarnate, as far as I can see. The problem in my mind is that genetic research, and the business of scientific research in general, is so tied up with capitalism as to lock workers in the field into a truly Faustian contract. People's feelings about Celera seem to largely be motivated by concern that Celera's work will break down the ties of scientific collaboration which research scientists have traditionally relied on.
This is of course a totally inadaquate response. What is *vitally needed* is putting this issue on the agenda as part of an attack on private property, and on capitalism. That's not going to happen from NGOs, professional environmentalists, or the UK Labour Party, though.
Science workers unite and take back science for the people! (yeah right, as if that's going to happen!)
Peter -- Peter van Heusden : pvanheus at hgmp.mrc.ac.uk : PGP key available Criticism has torn up the imaginary flowers from the chain not so that man shall wear the unadorned, bleak chain but so that he will shake off the chain and pluck the living flower. - Karl Marx
NOTE: I do not speak for the HGMP or the MRC.