1) Retirement - I got a ROTH IRA
I prefer a simple IRA as opposed to a ROTH IRA, since you get the benefit of a tax deduction in the current year. That's a matter of preference, though.
2) Long Term Investment
Mutual funds are well diversified, but if you want to invest in high risk / high reward, look for funds with high beta numbers. (Beta numbers refer to the stock's reaction to the stock market). I'm 31, and I'm 3/4 invested in high beta stocks, 1/4 invested in "benchmark" stocks. The high beta stocks tend to do very well when the stock market does well, but do very poorly when the market does poorly.
3) Short Term
your home is a great investment right now because of the exclusion of gain from the sale of a primary residence. You can exclude up to $250,000 ($500,000 for couples) in gain from the sale of your primary home from income taxes every two years.
4) Emergency Fund
If you invest it, keep it liquid; don't tie it up in investments that will make the cash difficult to access.
You seem to be headed in the right direction. You're definitely planning for retirement, which in itself is more than most people in your (our) age group do.