I received an email yesterday from Scott Hedges, an expatriate American living outside of Stockholm, who's familiar with the X-Houses and is a big fan of Swedish building and design. He found my blog through Stefan.
Scott pointed me to the website of Gregory La Vardera, an architect practicing in New England. Greg keeps a blog, and Scott has posted a few 'letters from Sweden' there which are much more informed than my ramblings here.
Scott's emails have made my day, and I plan to read Greg's blog regularly. I'll put up a link so all my other readers can, too.