Hi Sven, and welcome to Colorado. Also, to the mana drain since your posts show you're just getting started.
The recent tournament that was "cancelled" is merely delayed. There will be a Mox Emerald tournament run before the end of September in Boulder, and I will have a definate date and tournament announcement thread posted within the week.
In the meantime, there's a zero proxy T1 event at Black Gold on the 13th --->
http://www.themanadrain.com/index.php?topic=38397.0. Carl also runs weekly sanctioned events for vintage.
Rather than sing praises about the local scene, I'll let you judge for yourself if you come to these.