Have you ever used del.icio.us, digg, blogmarks, stumbleupon, ecto? (and many others) They are another way to get trafic.
Social bookmarking sites allow websurfers to save, catalog, and share interesting pages they find online.
In order to increase your audience, you must write high quality articles, and hope your readers will bookmark it.
I personnally use del.icio.us, digg and stumbleupon 
And do you know the sociable plugin ?
The Sociable plugin appends links for your readers to use those sites to the end of each of your blog's posts, increasing your potential audience.
(source: http://push.cx/sociable)
The original version has been made for wordpress (link above) but it's available for almost every blog platform.
One last thing ... do you like the Expat.com website? Don't forget to boorkmark it on your favourite bookmark site 
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