Hmm, I dont know if its worth it. I used
http://www.coinish.com/calc/ to calculate how much i would gain and its about 7 USD after a period of 12 months, not that high

I used the 0.2 BTC per chip figure and used his board costs plus other estimates and could not see how to make it pay either -- even beginning in August of this year.
At .08 or .09 per chip and a board cost -- getting delivery in August for possible September mining -- and onwards looks like it
might pay.
I used the calculator on The Genesis Block -- plus my own cost estimates -- to do the best guess that I could. What am I missing if anything? Can anyone help here.
Before anyone comments -- I have designed boards embedded systems and mainframe components so I am familiar with the hardware cycles and design issues. I am also familiar with costing and estimating. Somehow I am just not seeing this.
Has anybody got a link to a costing / estimating program for Bitcoin mining that can show how this board would pay for itself with an (mid) August or September startup?
Appreciate any response as this seems to be one of the few ways something might be done -- as the big houses seem to have delivery troubles.
Thanks in advance for any help that can be provided.