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There are other SE specific services aimed at page discovery, notably G's sitemap feature, but IMO, any search engine worth its salt should be able to find and effectively crawl your site without you telling them where to go (so to speak). :)
Major caveat: You must be sure to construct your site so that it is easily crawlable and doesn't confuse the SE's. Most importantly that means properly formed URI's, limited use of special characters, no use of "&ID=", and only one canonical version of the site selected "www" or "non-www", with the other version permanently redirected/rewritten (all pages should be one way, or the other).
Increasingly it is also important the the code of the pages be properly formed. At least, that means no broken tables or other badly written code, and at most, it means pages that are W3C compliant [validator.w3.org] (though for now, many sites are not compliant, but still rank well).