Don't Submit your domain to "free" submit it sites to 3000 search engines.. It's a con.
They submit your name to a whole load of statistic/analysis web sites that link to google etc. full of adsense and advert based display pages .. that DO NOT provide a link to YOUR domain/website.
The end result is - yeh your www.yourdomainname.com will rank high on google but if you click the google search link you get directed and re-directed to some crap statistics site saying how much your domain name is worth, how many hits etc.. total con.. they probably own / affiliate and earn dosh from  - total rip off. you and your site gain nothing, lots of bad exposure though.