My view of the globe is:
developed markets $, yen, eruo;
'emerging markets' BRIC countries,
then emerging markets that are stable, czech repub, greece, hungry, norway
then frontier markets such as tramx, femex, vietnam, columbia,

 From another post I made. 

I'll comment, because:  I'm 70% intl.  78% of the world market is outside the US, Fido stat.  To the nay sayers, what did they do as the dollar dropped?  I moved into other currency funds, they returned 20+% and the dollar dropping added another 5-10 % boost..  For those who stayed in US LC,  the foreign portion saved the LC, but overall they were down due to US content.

I have some concerns about having 20% in any single fund. I don't hold any more than 10 % in a single fund.  I may hold more on a market region, such as latin am,  holding prlax and flatx, I do watch for overlap in these conditions.

I would look to gain exposure in bric countries, namely russia, mid east right now.  I graph my holdings (via fido big charts) daily, and the shape of the russia charts is definitely different than the others.  and eurox, letrx has been consistently 30+% for 5 yrs now..

If you are in the better funds, top 20%, then you'll do good.  Make sure you are in funds that don't correlate, you'll come out ahead with less risk, another fido stat.

To answer you specific questions,

I hold a diversified Intl fund fdivx, then EM funds aemgx, demax,dregx, gbrax
then country/ region specific funds dpcrx, aacfx, mchfx, for china
for russia / eastern europe : letrx, eurox, mpymx, tramx, femex
latin Am -  prlax, flatx, uupix
India - mindx, emgix

a general EM fund will get the major companies, or a global level.  Region/ country funds will get the local/regional companies.

how many funds?  depends on how much $ you want to invest in this market...  I'd recommend 6 min to cover the globe. I probably have 20,  but I treat this as my core portfolio.  I invest in many different intl funds based on the classification I used above, 25 % developed, 50 % 'em-bric', 18 % em, 7% frontier.

They have had better than 30-50% for the past 5 yrs... When they drop they used to drop harder and faster than developed markets,,  In the past few yrs. this has been dampened due to global demand. 

the future??  I'll bet on Brazil, Russia, China, Korea and Japan doing well.  Each for a different reason.  Growth, currency, resources, consumers, producers, and accepting that the US will need a couple yrs to fill in the hole it dug..

Growth in the US will be preceded by foreign companies buying US companies...

A number of people would call this strategy crazy, not focused, risky..  These same people are holding US funds:  can you say enron, housing bail out, banking bail out?  next, inflation, higher taxes,