I wouldn't worry about registering your site. Although from the outlook it is easy to believe that the 'spiders' will immediately start crawling the site it is rarely the case. If the website is performing, the search engines will find it.
The biggest concern is being careful not to link build too quickly (I wouldn't even worry about this too much if its a reasonably small site). Other than that, I'd definitely recommend getting the site up and running sooner rather than later. One of Google's priorities in 2008 is content over everything else you've probably heard the buzz phrase "content is king". Google will never punish you for having too much content on your site as long as it is presented properly.
Keyword heavy, unique, relevant, updating content presented and archived properly alongside the basics (meta tagsurls/no frames/minimum flash), will ensure you're performing quickly and effectively.
There is no 'one size fits all' strategy, but I have seen companies who haven't even been indexed to having (and more importantly retaining)number 1/2/3 positions within 3 months through following these basic guidelines.
Ultimately, all you are doing through this is giving Google what it wants on a platform it can read.
My conclusion from an SEO point of view is to get the site to a stage where it won't discredit your business, then set it live.
Hope I've been of some use. If you have any questions/want any advice etc, don't hesitate to send me an email I'd be happy to help.
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