I'm setting up a niche community web site, I expect it to have a few hundred users to start, probably the maximum would be 1000-2000. Most of my experience has been with the ASP.Net/SQL Server world.
I'd like to know which low-cost or free user forum software is best, preferably one that could be fairly easily installed by someone with good windows knowledge but not much experience with mySQL, PHP, etc. I'm not opposed to using mySQL/PHP as I've heard some good packages are based on it, but would prefer to not have to incur a steep learning curve to get this up and going.
Solid dependability is important to me. I'd like a decent feature-set, but don't necessarily need all the bells and whistles.