Thanks for all the interest, guys! I'm glad you're as enthusiastic about the 6399 Airport Shuttle as I am. I'm considering building a city layout around it; I already have a 6597 Century Skyway (complete, thankfully) to go with the Shuttle once it's finished. Maybe the Town Plan and a 7994 City Harbor would fit in as well?
About future monorails...what with the new Power Functions elements and the trains redesign, it is clear that TLG is willing to invest in creating new electric parts. Given that the designs for monorail track have already been done, it does not seem like much to ask for TLG to re-make the monorail molds and find a new contractor for the motor. Sure, a monorail set would retail for serious money, but AFOLs, TFOLs, and parents have made Star Wars' UCS line a success, even the $500 Millennium Falcon. Heck, the Town Plan costs $150, and the current RC trains aren't cheap either. Plus, a re-made monorail system could provide a halo set for Mars Mission or another space theme (imagine that beautiful monorail track in new colors, like trans orange or black

).
@simonwillems: I respect your determination to repair your 6399 by buying a new sticker sheet from BL. One sheet sold for $45 this month, so I'm sure you paid some serious cash for yours. But since many of the stickers from mine are still present, buying a new one wouldn't make sense for me. Besides, once I learn to use The Brickfactory scans to print my own stickers, I can use that skill to fix some of my other old sets (I'm looking at you, 5956!)
@Fluyt: Unfortunately, I discovered that the gray baseplate in my pictures is not the correct baseplate. I should have
this, which costs $20. I don't think I'll buy this part, however, since it took me this long to notice that mine was incorrect.