Yes it’s important to let the spiders & crawlers & so on know how to index your new website!
At netgenus solutions, a site isn’t finished until your sitemap.xml & robots.txt are done – and validated.
Here’s a sitemap.xml validator: http://www.xml-sitemaps.com/validate-xml-sitemap.html
Here’s a robots.txt validator: http://tool.motoricerca.info/robots-checker.phtml
For an extra $150, you get the ‘full treatment’ – a Google Webmasters Tools setup where we submit your site, sitemap, perhaps do a ‘change of address’ for you, Google Analytics, more alt-tags on your images, and more!
For ONGOING SEO (remember, netgenus creates your website with search engines in mind, but that’s just your start!), we can recommend a couple of different companies, depending on your budget and goals.
One thing is for sure: if you decide to launch a full-blown SEO program after your site is launched, your SEO company is going to be pleasantly surprised by the attention to detail in your site’s crawlability right from the get-go!