Congratulations on the shiny Charmander. [:
I haven't run into any shinies since I found the three Skitty. But I also haven't been hunting at all. I'm not sure what to look for next...perhaps Gastly. That is, if the current swarm isn't something I'd like to catch as a shiny.
Also, I figured you guys might find this useful. It's helpful in searching for your next target: