Private trackers are great, but getting in can be a bitch (ask any friends, even online ones, if they'd have invites for any good ones)... Usenet is the best choice if the former is not an option. Monthly costs, sure, but then again you don't have to seed and keep a decent ratio like on torrent trackers.
It's sad to see Mininova go legal.. it really is. TPB is the only giant left and even they have a court date coming in 2010.. again. So who knows what's going to happen there.
I absolutely hate uploading to TPB though because they're trigger happy when it comes to banning people and once you're banned through TPB it's a bitch to get back on. I know Demonoid used to be exclusive and awesome but honestly I haven't seen decent results from them since they came back. I would love getting back into torrents if a decent network was born/launched.