Hi, just started mining. So far I only have nvidia GPU's; that is about to change by friday cause i just a hd7790!
I am really concerned about the affects asiacs will have on the bitcoin ecosystem.
Yeah, that hit me in the face when I upgraded my ATI card to a shiny new GeForce 660 Ti. In games, it's awesome. In hashrate... Damn. And I sold my ATI card to a friend to finance my GeForce, too. Good thing he hasn't come to pick it up yet. =P
As for ASICs... Yeah, difficulty is starting to skyrocket, so GPU mining
is getting harder. However, market price is also climbing, so it's still profitable to mine - for me, anyway. YMMV, depending on how costly electricity is around your part of the world.