Forum Moderators: buckworks
If by small-time you mean home based, you will probably be okay without a separate policy, at least to start. Check with your insurance agent; your homeowner policy may cover you or easily add an endorsement.
Once you have an establishment (even a rented desk in an existing office) and/or employees (other than off-site, bona-fide independent contract labor) you are playing a much bigger ballgame, and should carry insurance.
There are a lot of variables here. You'll have to consider your assets and risk exposure to determine your insurance needs; the kind of thing insurance agents do all day. :)
Good luck!
-Automan
I decided to incorporate instead. You and your corporation are legally separate entities. That gives you personally a certain amount of liability protection.