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I have a website which is on a .co.uk TLD and is primarily focused to the UK. Understandably I get very little in the way on US traffic, even though a lot of the content is applicable to the UK or US and could be made more so with a little tinkering. The domain has some age to it and ranks quite well for a variety of keywords and phrases, so it seems sensible to keep the site on this domain. The .com version of the domain is no longer available, and the current owner does not seem inclined to sell it to me. So, I am considering registering a very similar .com domain and simply using it to drive some traffic to the .co.uk site. To do this, I would have the same category pages and the same (or similar) list of links to the various pages in those categories. But instead instead of linking to a page on the new .com, it would take visitors to the existing page on the .co.uk. I would make this transparent to visitors ("Take a look at these pages on our sister site bluewidgets.co.uk") and the .com would have some unique content of its own. Would this be considered some kind of Doorway site/page (content rich doorway), or is it simply bad idea which is unlikely to drive any traffic?

Possibly seems a strange question, but let me clarify... I have a new site in mind and all the domain names I was considering for it have been taken (I want a .com or a .net if at all possible). However, I can get the domain with a z at the end rather than an s Example: www.keyword-guides.com is taken, but www.keyword-guidez.com is available. Am I completely wrong in thinking that it will still match well for anyone searching Keyword Guide, and should match fairly well (even though it is a partial match) for people searching Keyword Guides. As the keyword is the most relevant bit of the domain, and as the first word on the domain is given the most weight, will having Z instead of S at the end make any difference at all? Personally, I don't really like the Z option, but if it would have no (or little) impact on my SEO efforts, I could live with it.

A few pages on one of my sites have underscores linking keywords rather than hyphens (keywords_and_keyword rather than keyword-and-keyword). Possibly from a time before I knew hyphens were preferred... One of the pages ranks well, and drives a good amount of traffic. The others do not do so well, but are still within the top 10 landing pages for the site. Is it worth me changing the underscores to hyphens (setting up 301 redirects first of course) or doesn't it make that much difference?

One (in fact a couple) of my sites is built using Wordpress so I could take advantage of things like Related Posts widgets, etc. However, the layout and navigation of the site is set up more like a traditional website rather than a blog and from the beginning I removed the comment box from the template. I am wondering now whether allowing comments would actually be a good idea for SEO, or if I should leave it as it is. The content of the site doesn't really offer opinions (aside from a few product reviews) so to my mind comments dont really fit. Thoughts or opinions readily welcomed...

This may be a very basic question... In terms of the overall benefit to the SEO of a website, is it better to have, say, 4 pages about different aspects of the same subject (i.e. wooden lintels, steel lintels, concrete lintels and cavity lintels) or to have one page containing all the information? I have a site with roughly 250 pages, which could probably condense down to almost half that. The vast majority of inbound links point to either the homepage or one of the 20-odd most vistited pages. Of those, 2 or 3 pages count for roughly 70% of entrances. So should I concentrate on adding new pages, or improving/expanding the existing pages?

My site is aimed primarily at the UK, 90% of the traffic is from the UK and most of my links are from other UK based and UK targetted websites. The content is actually fairly international (apart from certain terms like Plasterboard instead of Drywall, etc). My question is: Should I concentrate on gathering links from the UK, or should I widen my search and try to get links from US and European websites? Are there any particular advantages or disadvantages to keeping links "local"?