Basic Info:

NCBI: A Science Primer.

The Human Genome Project: SNP Fact Sheet.

Data Bases:

NCBI: dbSNP.

MIT Broad Institute: Human SNP Database.

Other Web Recources:

The SNP Consortium.

The HapMap Project.

Human Genome Browser.

Some Papers of Interest:

Ardie et al (2002) Patterns of linkage disequilibrium in the human genome.

Botstein et al (2003) Discovering genotypes underlying human phenotypes ...

Cardon et al (2003) Using haplotype blocks to map human complex trait loci.

Schork et al (2000) Single nucleotide polymorphisms and the future of genetic epidemiology.