Hello...
I use K2 a very long time now.... (last week i have Update to Joomla 1.7 with the new Release of K2)
But i miss one feature....

I wanna Post Article (one Article (no copy)) in more than one Category ... MultiCat Support for Article....

Few Hundreds, Thousand of People ask for this Feature but i havent found a Feature.... like this...

Is this possible... is this planned? is there a plug for this feature?

It does appear to be planned for v3 per this video (around 18:00 minutes)
vimeo.com/25408926

As well, there is a paid extension available that does this.
usjoomlapros.com/Extensions/K2-Multi-Categories/flypage.tpl.html

Personally, I'll be waiting for the v3 implementation... I currently use tags to deal with the issue, but it's a cumbersome solution.

I'll poke. What's the ETA on V3 K2 Crew?