Investing $2-4k: what would YOU do?

[cscmc1]

If you had $2-4K to put aside, what would you do? Let me set the stage, if you'll indulge me.

I am recently married, and I don't want to put (much of) this money so far "aside" that I can't get to it in case of emergency, but I would like to see it do more than the petty interest it'll get in a savings account. I already invest in a Roth IRA each month, and have a few bucks set aside for small emergencies, but I'd like to know that some will be available, too, if I need it. Are CDs worthwhile? Anything else that'll perform better than a savings account? What's the general consensus on Gov't bonds? If I could keep half of this money within emergency's reach I'd be happy... the rest I could do without for a while I suppose. Throw the extra at my Roth IRA?

Thanks in advance for any advice. I am aware that this is an odd request with potential risks, but I generally trust the judgement of many of the folks here. Of course, I will very thoroughly weigh the pros and cons of any suggestions before acting.