Dcode.org 
 ECR Browser 
 ECRBase 
 Mulan 
 zPicture 
 DiRE 
 SynoR 
 rVista 2.0 
 multiTF 
 Array2BIO 
 eShadow 

Update (3/29/2008): We have recently modified ECR Browser alignments by including repetitive elements. All ECRbase ECRs correspond to new ECR Browser alignments now. Additionally, individual ECRs have been annotated according to their relationship to RefSeq genes and repetitive elements.
ECRbase is the Database of Evolutionary Conserved Regions (ECRs), Promoters,
and Transcription Factor Binding Sites in Vertebrate Genomes
created using ECR Browser alignments

  Evolutionary Conserved Regions (ECRs)
from multi-genome comparisons
  Promoters
of RefSeq and UCSC known genes
  Synteny
between genomes
  Transcription Factor Binding Sites
in promoters and ECRs
  SQL
index of summary tables
  Citing
ECRbase in publications
    Details

NCBI DCODE.org Comparative Genomics Developments (www.dcode.org)