Rule #1, don't talk about this anywhere else. I saw one person mention it, I don't remember if I said last time to not talk about it, but I'm saying it now. Don't talk about this. I don't want Jagex to know I've even acknowledged their emails (or in this case, actual letter).
Rule #2, see Rule #1.
Ok, this time they had a law firm send an email, when I ignored that the law firm sent a registered letter all the way from the UK. Unfortunately I was out today for about an hour or so, just long enough for the mail to come and my wife signed for it (doh!). I still don't think they have a case, but I'm going to take some precautions (you may notice the new disclaimers on all RuneScape related forums).
Don't worry, the RuneScape forums aren't going anywhere yet. My guess is the worst case would be that we rename them to something not related to RuneScape, and maybe even have some "rules" that prohibit users from talking about certain things (such as hacking/cracking RuneScape, though everything I've seen has been bogus, and buying and selling). Of course, it'll be hard for us to moderate every single thread (especially if we suddenly lose our moderators, wink wink), and we'd have to rely on Jagex to report every single infringing post. In this scenario, not much will change. I mean, instead of saying you're selling a RuneScape character, you just say you're selling a character on a well known game, give the stats, and say to PM for more info. Everyone knows you're selling a RuneScape character, but if you don't actually say it, Jagex can't prove that's what you're talking about. I doubt they'll go to the trouble to have someone sign up on the forum and PM everyone asking what game is their character on, even if they did, I personally am off the hook (just by looking at the post, which doesn't mention RuneScape, I have absolutely no idea that they're talking about RuneScape).
Just thought you guys should know, this way you won't be surprised if for example the RuneScape forums become the PuneScape forums or whatever. If they're renamed, just act surprised like everyone else but tell everyone in hushed tones that it's still business as usual.