Heard of a guy named Mike Ro who had a website/url called MikeRoSoft. He got sued.
I think Microsoft filed suit - for obvious reasons - but the court sided with Mike Ro. However, Mr. Ro being a reasonably smart guy did in fact settle out of court with Microsoft. I beleive.
I think making a tech website and forum would cause confusion in the marketplace, but also you can't have IP on names (e.g. Mike Ro). I would suspect that something like Amanda-Tech would be more resistant; some minor variation. Amanda as a name can't be intellectually protected and the word 'tech' can't be protected. Lawsuits still cost money, though.