Hey bowman, firstly, I'd just like to point out my commission thread here: http://www.guildwarsguru.com/forum/s....php?p=1994949
The reason I made two threads, was so that I could, to some extent, keep the art and the services/business seperate. Of course, that's not always as easy as it sounds
As for your specific requests, I don't mind doing multiple works for people, but they have to understand that they will only get one image per place in the queue, and (as you ackowledged) there will be significant waits between them.
As for the resolution of the images, I usually work to A4 size (roughly 12" 8") at 300DPI. I'll usually half this resolution for digitial display (since not even someone with a 40" monitor would fit that on their screen

)
so, doing somthing at A2 at 300 DPI, would be approximatly four times larger than I usually work. This would either mean scaling up my sketches or I'd have to do an image four times larger than I'm used to. The first option may be viable, without doing some test prints with my sketches, I've no idea how they'd look at that size. The second option, "might" be doable, but it would entail quite a bit more work, and depending what else I was doing when I took on the commission, I'd have to make the decision then.