Generating interactive HTML charts from Python?
My answer to Generating interactive HTML charts from Python? on Ask MetaFilter
D3 is absolutely amazing but the learning curve is a bit steep. Totally worth the effort to learn it in the long run, but it’s not so useful if you want to get something done quickly.
I’ve used NVD3 successfully in the past—it’s another high level library on top of D3. Much faster to get results than D3 on its own.
From your description it sounds like you should also check out crossfilter which, for the right use-cases, is phenomenal.