I just got a Canon G12. I also have two Pentax DSLR's...one a K10D , the other a KM/K2000.
I have a Pentax 360 flash unit, which I finally figured out and it works quite well with the Pentax bodies.
But I would like to get an add on flash for my Canon G12 and although I originally thought about getting a Canon 270....now I'm thinking that maybe it would be a better idea to get a flash that I could use with my Pentax DSLR's and Canon G series .
In other words....get neither a Pentax or a Canon flash...but some after market brand that I could use on both makes.
I like plenty of power, I like reliable, durable, good quality.
What flash would work well with both Pentax and Canon systems ?
Anything else I should think about..flash wise ?

