Hi I have recently joined the largest online cytogenetics discussion forum hosted called the Cytogenetics-Methods-and Trouble-shooting Forum. The forum is hosted by Google and its free to join. Thier web link is : http://groups.google.com.au/group/cytogenetics-methods-and-trouble-shooting. The group covers all areas in cytogenetics including: discussions of blood/bone marrow/solid tumour/prenatal/skins/POC cytogenetic methodologies. Trouble-shooting all cytogenetic problems such as harvesting problems, banding and cell culture. I highly recommended it to others to join.