http://www.plasmaneem.com/neem.htm for neem...safers is great but kuul has the best idea with a little detergent in the spray bottle. Sounds like fungus gnats. The yellow sticky pest strip is an excellant way to go.
The Safers , Neem and dish soap are all fairly benign derivatives. Remember whatever you spray on your plants, you will be ingesting.
Bekind/Cathy
growweed.com