Analysis tools:

Microarrays.org protocols and freeware for microarray analysis

Expression profiler - EBIs set of tools for microarray analysis

Gene Expression Omnibus: NIH Data Upload Site for array comparisons 

ExpressDB: Harvard's relational database of yeast RNA expression data developed by George Church's lab, also supplemental material to his Genome Research article "Systematic management and analysis of yeast gene expression data." Genome Res. 10:431-445 

ChipDB - the Whitehead Institute's array database - set intersection and sample clustering tools

Microarray explorer: NCI program for microarray analysis
 
 MICROARRAY DATA FOR DOWNLOADS

EMBL microarray data depositiory