Let me tell you bit about psvitaforum.
I started back in January right after the announcement of the NGP. I had a similar cmeinck as having a license already and it took me about an hour before I decided I was going to give it a strong effort.
Starting out as ngptalk. Membership started out slow for a long time but I never had my hopes shot down because I did have the most active community out there. I later purchased ngpforum.com and continued on. The style of the site changed over time as being the default skin to a modification of whisper and then finally to the themesinc's xenfracture which is really an impressive skin and actually the activity level of that forum picked up a lot during that time and membership was growing at up to 5 people a day. It was probably a combination of good rankings by google as well as the beautiful skin. Then forum activity slowed down and my google rankings dropped like a rock. Luckily my members continued to be active and some of them became standouts (one is going to pass me in posts any day now). There was one event to look forward to that would have a critical impact on my website which was E3 2011. Luckily due to leaks, I make the gamble and registered psvitaforum. Now that I look back I wish I believed it a bit more.
Activity on the forum increased from the current members as people became excited. The E3 Sony press conference occurred and like I expected, psvita was declared the name and right after the conference ended, my website instantly had over 200 guests. Since then I've been doing well and signups have returned to up to 5 a day. It hasn't exploded yet but activity on the forum has. Over 1500 posts since Sunday and my forum only has 3667 posts! The members continue to impress me and not only speak highly about the site but also the software. Heres a quote from a member that signed up two days ago.
Totally off-topic, but this forum is epic, probably the cleanest looking forum I have ever seen, in terms of it's actual scripting.