While there is likely to be lively competition in interpreting the HDF images and carrying out follow up observations, it is our hope that there will not be much needless duplication of effort. To this end, we invite anyone contemplating followup observations or detailed analysis to share information through the HDF web page. ... Hawaii Hubble Deep Field North (Subaru images). Hawaii Flanking Field Catalog. ... ISO HDF followup observations -- data and preprints available . ...