Possible Duplicate:
Do dedicated IP addresses improve SEO?
There are occasionally cases in which a client owns multiple domains for his business. For example a client may own landscaping.com, and also own newyork-landscaping.com and etc...
I have a question regarding the SEO strategy for a business in such cases, assuming that there are 50 domains for different cities, and assuming that there is unique content on every one of those 50 domains.
Is it better to have different IP addresses for each domain?