I believe if you get more links from .co.uk domains for example you would rank better in google.co.uk and so on for country specific domains, am I right? So how can I search for only sites that have the .co.uk TLD? for example, say I want to search for sites with .co.uk in the real estate niche, what string can I use? Thanks
Key in the following into Google search box Which means that you are searching for the exact string, 'real estate' in the content of all the sites that resides in the .co.uk domain
Also, don't forget to use geo-targeting in Google Webmasters Central, this tool is over looked constantly by many different webmasters.