+1 I'd agree it'd add a little zazz when you appear in a puff of smoke. But maybe you could also buy modifiers for that that would make you appear in different ways, like an explosion, a sparkly cloud, a wisp of flame, materializing like in star trek with a glow of energy, rising up out of the ground on a platform. The possibilities are limitless!
I think it'd be alot cooler to be able to choose it, myself, but I'm a customization hound to the extreme. Not that, I'd wanna pay for it, free is always good lol, but I'd also say that various teleport effects would probably sell pretty well if they were priced right. On another MMO I used to play (Highly inferior to glitch) They had cash shop items like that, and they seemed to sell very well. And I do like the idea of Tiny speck making tons of money, because you deserve it, and I know that the more money they make the more they'll work on the game and the bigger it'll get, which I'm greatly looking forward to!