Adding to intl versions of Google?

[scanlin]

I ran the SEOmoz Competitive Link Finder tool for my URL and 5 of my competitors. The #1 result (where 3 of my competitors are listed but I'm not) is google.com.sg. Here's the URL where they are listed:

http://www.google.com.sg/alpha/Top/Business/Investing/Derivatives/Options/Research_and_Analysis/

All 5 of us are US-based companies. Why would 3 of them be listed in the Singapore version of Google but not me? Is it common practice to add your URL to all local versions of Google, or should submission to the main google.com be enough?

[AdamThompson]

That's the Google directory, not Google Web Search. I think Google directory still pulls their listings from DMOZ.

[scanlin]

Well, I'm listed in DMOZ along with my competitors. Why would google.com.sg show a different set of DMOZ listings? Maybe this is just random, or perhaps nothing I can do about it. I was merely trying to get the same (relevant) links my competitors had and was wondering if there's anything I can do to affect google.com.sg's showing them but not me...