Photogs: lighting kit suggestions under $500?

[furrygirl]

I'm looking to get an basic "studio" lighting setup, and I have no idea where to begin. Lots of my content uses only natural light, and some of it is other diffused cheapie lighting sources. I've poked around on eBay, but I have no idea which brands are decent and what best suits my needs.

What would the photographers out there recommend for a decent lighting setup for under $500?

Important points to me are simple assembly, relatively compact to travel with, soft continuous non-flash lighting, and something that's not going to catch on fire. I doubt the lights will ever be on for more than a couple fo hours, so being able to put in lengthy sessions is not an issue. I'm also not sure as to whether umbrella-type lights or soft boxes are better for me, I suppose it depends on what is easier to store or travel with.

Thanks!