In Monte Cooke's Chaositech there are several replacement limbs. (And you can ignore the flavor text if you desire, so they don't mutate/drive to insanity any PC's)
Although I sometimes compile a house rules document before a campaign starts, I am not really big on errata. It seems to be too much extra work, although that would be the perfect place to incorporate it.
It seems to me that someone who knows so very little about the RPG market shouldn't really by trying to sell anything in it - certainly not while badmouthing other authors.
I just do an advanced Google Search when I want to find something that's more than a few days old. It usually works like a charm, you just have to specify that you only want results from enworld.org
Honestly, I (as DM) would prefer to take the key abilities of prestige classes, and make them into feat-chains, rather than dealing with multiple classes, but I also give out more feats than normal in most campaigns.
For statting NPC's I'm giving serious thought to using the DM's best friend (http://www.enworld.org/showthread.php?t=192437), and just describing anything unusual that a monster or NPC has.
If 1 in every 20 people who has posted on a thread excited about the new edition of Delta Green actually buys a copy, I'm pretty sure they won't have any trouble selling through their print run.
How important are pretty maps in an adventure module? Is it more important that they look good, or are easy to use, or are both equally important?
Thanks for your input!
Perhaps Hadrian's wall is a better example - it was breached many times by the picts et al - do your players have the means to hire someone as a distraction? (Get them to sneak over the wall a couple miles away.)