There are a few posts just two pages deep that address the same
questions.

http://groups.google.com/group/misc....4f1a2c4f?hl=en

http://groups.google.com/group/misc....1b72ff89?hl=en

for example.

Hello all,

I just want to get some opinions on my asset allocation for my 401K. Is
this too aggressive, not well diversified? I'm still fairly new to this so
thanks for your advice. I'm 27 y/o single and contribute 10% of my salary
to my 401K (with employer matching 4%).

45% - S&P 500 Index fund
15% Mid-cap value fund
20% - MId-grap growtih fund
20% - Small-cap value fund

I don't have any international here, but I did just open a Roth IRA for 2005
and put the total amount in Vanguard's Total International Index fund. Your
comments are appreciated. Thanks

Mike