Congratulations, good job there!
>>top 30 in 4 others. This just happened today.
>>what can I do to get those top 30 results into the top 10?
Most of those others are probably internal pages.
>>Should I create more optimized pages for each search term, or tweak the index page a little?
Definitely create more content pages. As the site grows so will the instances of internal anchor text and you'll also diversify and make the site richer and better for visitors. Watch your referrals and look for additional keyword opportunities to target, then build pages around those. You'll see which ones draw more traffic - relative to the position they're in and learn to strategize for further site development.
>>only got 4 backlinks listed on google
PR0 means nothing right now with a new site, or even new pages. Just focus on rankings. And it does take a while for backlinks to show - some never will, not all do.
>>My question is.. what now?
Continue to do more of the same and also pay some attention to Inktomi. Not only did Yahoo buy Inktomi, but MSN can bring some good traffic that converts nicely.