I posted a poison deck here
http://www.casualplayers.org/forums/showthread.php?s=&threadid=13927
that actually fairs pretty well..
I think the biggest problem with poison counters is that marsh viper... easily the best poison Creature is a 1/2 wuss that costs as much as a blastoderm.
I never tried using swamp mosquitos and suq ata assassins tho.
if they brought back poison in any shape or form, whether it be sorcery based, tacking the ability onto a creature, or just providing more.. it could be amazing...
if the creatures are black, we have removal
If theyre red, we have burn,
white would be kinda silly, as would blue
I have a feeling the snakes of kamigawa CAN rock.. i mean without a lure...