I have $5100 in my 2 year old's 529 - I put in $200 a month. I would love to hear others with 529's, what they decided to put their money in - mine are a bit riskier bc of son's age but admittedly, it stresses me out.
My oldest son's portfolio with % invested
Aggressive Age-Based Option:
Vanguard Growth Portfolio 20%
Moderate Age-Based Option:
Vanguard Moderate Growth Portfolio 20%
American Century International Growth Portfolio 10%
American Century Growth Portfolio 25%
Vanguard Aggressive Growth Portfolio 25%
And my youngest son's portfolio (they are 3 school years apart)
Aggressive Age-Based Option:
Vanguard Growth Portfolio 20%
Moderate Age-Based Option:
Vanguard Moderate Growth Portfolio 20%
American Century Growth Portfolio 20%
Vanguard Aggressive Growth Portfolio 20%
Vanguard Growth Portfolio 20%
My oldest son's portfolio is outdoing the youngest but not by a ton (its like $30 difference).
We also have about the same mix on our 401(k)s. Last year I averaged about an 11-30% return on all our accounts (11% on the 529's, 30% on dh's 401(k)). This year I am hovering at about even most days with the stock market fluctuating so badly. We made up everything that was lost in 2008 by the end of 2009 and really haven't lost anything this year either.