Meh, I'm not a big fan of Kazaa (normal or lite). WinMX still works well for me. If you can't connect for prolonged periods, it's because assholes aren't being primary connections. Generally when I connect I do that, because I like helping other people. It does suck down 25-100% of CPU, and basically all my upstream bandwidth, though. I haven't been using WinMX much lately at all though either.
I personally use
DC++ almost exclusively. I do have the advantage of being on a private hub, with ~15 TB of data, and people who *actually* share lots, and *actually* stay on long enough to download 8 GB of data, though.