tedster - 3:32 pm on Aug 18, 2010 (gmt 0)
@gouri - the domain name is a separate question from keywords in the file path. In the file path, keywords seem to be noted but at a very low level of importance. Within that already low level of weight, the most likely to have problems is concatenated keywords, the second lowest is the underscore separation, and the best situation is the dash - but it's still a very small factor.
However, this discussion is about keyword domains - and I agree with the earlier comments that keyword domains benefit from natural keyword anchor text in their backlinks.