Update for my screwed up (no DME) recipe. I bottled a week ago, and it's still flat, but tastes good. I ended up adding more vanilla at bottling time, and am glad I did. The vanilla is perfectly balanced with the roast/coffee notes. As for the lack of DME during the boil, it doesn't seem to have caused any major problems. My beer has a similar mouthfeel to a lot of stouts I have had. Alcohol content may be down a tad, but that's no biggie.
Cheers, and thanks for posting this recipe!