It's impossible to guarantee inclusion at all. No one can guarantee inclusion. The search engines decide when and who gets included. I think the whole idea of "guaranteed inclusion" is a) a pointless and b) a big lie.

Whenever I SEO any website, I submit to SEs and within 2 weeks Google/Yahoo and MSN have at least partially indexed the website. Give it 6-8 weeks and the big guns have indexed the entire website. It's never taken longer...

So what's all the fuss about???