Welcome to the forum
Don't try to get too complex to start. Your 401k is your only investment so far and your spouse is not yet employed, so I agree with this simple suggestion for your 401k --
30%, Core Bond Enhanced Index/PIM Fund 0.22 (uses Barclays Capital U.S. Aggregate Bond Index)
70%, Dryden S&P 500 Index Fund .07.
Be sure to contribute enough to the 401k to get the full match each year; its free money, never turn down free money.
Keep it simple. You can reevaluate the 70/30 split after a year or two, if you wish.
Before then do some reading. Try one or two books from the General Investing section of this reading list -- http://www.bogleheads.org/readbooks.htm
, and some pages from the wiki, like this -- Wiki article link: Asset Allocation
; and Wiki article link: Domestic/International