Follow Up Question about ETFs

[jmxthievez]

So I had a recently question about investing 50k in the market, I described myself as fairly tolerant to risk as I have made some money playing poker and am currently 21.
(here: http://forumserver.twoplustwo.com/showfl...e#Post11225328)

I am looking to invest anywhere from 50k-100k (does this # matter on the advice) I received advice to go 100% stocks, and basically allocate 80% of my portfolio to domestic stocks and 20% to international.

Recently, I have been reading up on more material and came across this thread: http://forumserver.twoplustwo.com/showfl...=0#Post11605238

Where jively made some great points, which got me thinking again. Should my portfolio be a bit more diversified? Should I perhaps not go 100% stocks and maybe do a 90/10 or 80/20 combo? What other factors should I consider?

Paging jively, jimmysnow and all BFI regulars, I would appreciate further advice a great deal and what you say will 100% directly influence what I will do with my money. If the posters from the other thread and others might respond, it'd be great. Thanks.

edit: or point me to a resource where I can further educate myself in addition
I guess my main question is the diversification of your funds, and why people disagree on the allocation and their thought process as to why.