There's a low carb bread at my favorite low carb store that's sourdough and has 2 grams per slice. It tastes right, it's just spongier than normal bread. For the life of me, I can't remember what it's called.
Also, I was at the grocery store last night and found that they're carrying low carb bread now, too. I tried a loaf a Franz 7.7.60 bread. It's wonderful! Tastes like the love child of white and wheat bread and it only has 4 grams per slice.