Cookpot....I use the same pot for all stoves. It's a super-thin, squat and wide pot I salvaged from a "stainless cookset" bought at walmart. You can see a picture of it in my "Altoids Stove" instructions in the 'make your own gear" section. They are still available. http://www.backpacking.net/makegear/altoids-stove/index.html
The pot looks much bigger in the picture than it actually it. My guess is that its about 6 inches wide and 1.75" tall. Works great on the Svea.
We've used the Svea's at chili cookoffs and youth campouts with 4 quart pots on top, if you want to go really big. <img src="/forums/images/graemlins/grin.gif" alt="" />

Refueling....an MSR/Optimus fuel bottle with a refueling spout/valve on it. Don't remember who make them but they work great. Good for dribbling fuel for priming too. Like this:
http://www.rei.com/product/402119

Alternate fuels....why? Camp gas seems to be everywhere. I've heard of folks using auto gas and kerosene in Sveas/R8's but I understand it's very sooty and the stoves aren't jetted for such things. Remember, the fuel is 'wicked' to the generator chamber with a cotton mop. I wouldn't put anything in there that will goo it up.
To be certain, a call to A&H will provide the answer....they know these stoves better than anybody.