We took out the browse host option because it did not work 90% of the time. We will likely bring a modified version back that will work almost all of the time in a future release.

We took out the community tab for a similar reason -- it worked no better for finding files of a particular type than a normal search did.

For anyone having trouble getting search results, make sure you're using LimeWire 2.1.1, as it is much better.