He might be able to trace your IP address, but only to the extent of knowing who your ISP is. He won't be able to narrow it down any further than that and I find it doubtful that your ISP would release any records to him. So don't worry about that.

Jochen was in close PM contact with one of the mods(oggy), so I am not sure how far that goes for asking IP.
I already asked them to delete my account, after I was posting for the first time on the german board. They didn't do shit, but it's good to know he was banned there.
I will cool down for now, take a shower, make some more playthroughs, maybe write alittle for my thesis. Man, I wish I were like some of you, more level headed 8(....

I think you give him way too much credit. He can't get anything more than your IP address, and there's no way your ISP will give him anything else. Turn off your router/modem/computer for an hour and get a new IP address.
I've requested a refund, of course he (or whoever Jennifer Kolbe is) doesn't want to give it. An old college buddy's a lawyer, so if necessary I'll talk to him about a class action lawsuit. I hate to go that route over such a piddly amount, but this guy's a dirtbag.

fact is, he did this many times before to his customers (read the post of iLag at indiegames, or the threads about him in the anything4free forum) or critics, or at last was threatening them with legal actions. and thats not such a bad idea. if this all will crush, what it is already doing, he will have a nice excuse, that others destroyed his great business idea. even if the police will stop an investigation, the excuse will be there ;)
anyway, tantrix has nothing to fear, because the saving of ip�s in germany was stated to be illegal by highhest german courts. he will have no chance to find out, who you are. it�s just his helpless way to react to critics and he is doing it everytime the same way.
just read the posts on gulli, where a guy made a nice summary of jochen�s actions ;)
http://board.gulli.com/thread/1538397-g-data-einstweilige-verfuegung-gegen-gamerdealsde/3/
posts72, 78 and so on, it�s all priceless and worth a read, as a tip to german speaking folks :)
and as it seems, some of the mods there has been even working for him. so there seems to be a good contact between them.
but i wouldnt care anyway. your isp has no right to record your ip for a time.

HAHA I see what you did there!

He's a busy man. He's got places to go; people to hide from.

lol, i found his youtube channel: http://www.youtube.com/user/hornedry2k#p/u/68/WIrd7-x_324
that his wife.
edit: not the nice moderator at the beginning ;)

I would really like to know which paragraph he is talking about. As far as i know, nothing that you've done is illegal in our country. ;)
You provided links to already publicly available sites about previous "actions" of him and you asked some of his so-called business partners if they are his business partners. Nothing of this is forbidden in germany. What would be forbidden is the accusation of someone with things that aren't true, but he would have to prove that and that would be quite difficult for him...
Also, when you read through his arguments for his other "faults" in the various interviews, you should pretty quickly notice that this guy has absolutely no concept of laws or business rules or anything else... It's just childish behavior from a guy who stands with his back to the wall. ;)

Is it just me or does that sound like the plot of a TV show? A modern day snake oil salesman driving around to a new town each week in a beat up old car trying to con the townspeople only to be discovered and run out of town at the end of every episode in a humorous chase sequence

He didn't ever change his nickname, didn't he? ^^
Seems pretty easy to find stuff about him this way...
Now one can even tell if the paypal account of givewhateveryouwant really is his wifes, as we now know her name is Jennifer... ;)

lol, yeah, i love this simpsons episode, where homer and grampa are selling an elixir ;)

Let's get a pilot written and pitch it to FOX!

Or it could be a Richard Matheson short story. It would end with a brilliant twist. The only I can think of would be that he concluded a pact with the Devil for eternal life, but that the Devil has him scamming people for all eternity in return.
Matheson would do something a million times better with it. Read his short stories, he is a genius.