who sells an installed sd-card ?
I don't know - but if someone does, we'd love to hear.
The 4273pi project has been thinking of setting up an SD initialising service. The plan would be, people could send us blank SD or microSD cards, and we'd initialise them with 4273pi - either free of charge or at a low cost (e.g. to cover postage).
We have no such service yet, but we'd be interested in trying this on a small scale. Please contact me by email before sending any cards - including an estimate of quantitites, time-scale required, and the country where you're based. We'll see if we can help. You can find my email under "contact", here:
how does it compare with "bio-linux"
EOS BioLinux has more software, but doesn't work on the Pi. Also, 4273pi includes the materials for a course in bioinformatics, "4273pi Bioinformatics for Biologists". Both projects benefit from debian-med, which has ported a range of biomedical software to the Debian package system.
I regret, I don't know this one.