Updated for Avacyn. I think the artist will be a huge help when facing board wipes.
I'd drop 2 of something and put in 2 Day of Judgement. When you wipe the board with Blood Artist on the field you are going to be doing some serious damage if you've got plenty of tokens out. Might even seal the win right there.
there is a deck for Blood Artist, but it is not this deck (read in the voice of viggo mortensen as aragorn). Maybe drop him for a couple Champion of the Parish and 2 more Gather the Townsfolk. Also, Angel of Jubilation is awesome but since you already have Intangible Virtue and Honor of the Pure, it doesn't do much unless you're playing a pod deck. Something else to consider might be revising your sideboard. Sword of Body and Mind isn't the best token producer. If you want something to make a lot of tokens Shrine of Loyal Legions does that pretty awesomely. I've popped it and made up 14 tokens before, which is pretty unbeatable with an Intangible Virtue on the field. Ratchet Bomb is pretty much only used against token decks, so it would really only hurt you. You might consider mainboarding Elspeth Tirel in place of DOJ. Sorry for all the text. I really like tokens. +1
I've made a few changes. I've been running this at Friday Night Magic and cant seem to break 50/50.