Great concept and I really look forward to more of these. My biggest beef with the Spinward Marches book was that only a few planets were covered at any level of detail, so this would help fill that gap.
My one concern in looking through the few pages that are available on RPGNow is that there are some real inconsistencies in the data as presented. The doc says that Callia has a population in the hundreds of millions in one place and 900,000 in another. Also, the capital is variously given a population of 39,000 and 75,000. And those are just in the first few pages. I know these seem like niggling details -- and they are -- but because the PDF is a little pricey for 23 pages I'm concerned about the attention to detail and editing of the product. Because of all the errata in the first printing of the main book, I feel like I've already gotten burned once and don't want it to happen again.
Can anyone allay my concerns?