April,
The costs on this swap were significantly higher for me than previous swaps. I'm not sure what the difference is...but sending out the fabric cost me $.61 per envelope. Mailing the blocks back varied from $1.21 each to $.63 each. All were the same blocks in the same packaging!!
I would like to participate in Boom 4.0 but only if we have a swap of 24. If you make a swap like that, please add me. Otherwise, I will have to wait and save my pennies! :D