I've been running webhosting farms for over five years and for the past year, we have been running entirely Host Header based webhosting. Also, because we run everything clustered we've had to become inventive if it isn't a good candidate for NAT (too many IPs and not enough management resources on the load balancer, etc). There is only a small number of services that currently really require dedicated IPs. HTTPS and Anonymous FTP. Although, the HTTPS is a concern - not that many customers actually use the Anonymous FTP service. We ended up offering Anonymous FTP as a premium service (I like to think that this cuts down on warez and script kiddie distribution). HTTPS is offered as a premium service as well, but is served out of it's own cluster so we don't have to make sure that IPs are predefined for the sites. Code can be altered to reflect hostnames based on user logins or can be simply made generic or NoName branded. A few customers will whine, but 98% don't know the difference, understand and accept the limititations, or are just so damn happy it works that they don't mind. Although I do agree that ARIN does tend to be anal, I believe some system architects would have shot us all in the foot by now if they hadn't put their foot down. We just have to be cleverer than them and I think that shouldn't be too hard, right? Karyn