In the meantime, if you enjoyed Nethereal and want to see more work like it out of Brian in the future, make sure you pick up a copy of the sequel, Soul Dancer. Who knows, it might just be a future Puppy of the Month itself!
A little easier and a lot cheaper thing you can do to support Puppy-related literature is to go leave a review over at Amazon.com (by clicking on this link). The inner workings of Amazon's algorithms are a mystery, but every review adds weight to a book's profile. So the more reviews a book has, the higher its visibility on Amazon. Word on the street is that 50 reviews is when Amazon really starts paying attention. As of this writing, Nethereal has 38. If you add one more note - even a quick two or three sentences - that will help get the book in front of more casual fans of sf/f. And that will help you get more Niemeierian works on the market.