Well, in the end I couldn't wait.

This was my night with no kids, no practice (cancelled!) and nothing else to be doing. I went to the UPS customer center after work and picked up the bass once the truck got finished with its deliveries....
She got here safe and sound, thank goodness. And she's a beauty! As bassplace said about his Harlot, the shape is a little "alien" looking, much more so in person than in pictures. Not in a bad way--the Harlot and the David King D Bass are probably the most graceful bass designs I've ever seen--but seeing her in the standard Hiscock case, holding her in your hands, and strapping her on, you realize that she bears not even a passing resemblance to a Jazz Bass. And that's a Good Thing (even though I like Jazz Basses).
The myrtle top is amazing. I wish there were no pickups, controls and bridge getting in the way and blocking all that beautiful wood! The myrtle back looks great, of course, but the top is truly amazing. Sadly, the Great Bandsaw Accident meant that the headstock overlay ended up not being a perfect match, but the flamed myrtle that Alan chose looks great nonetheless.
Strapped on, the Harlot is every bit the sensual pleasure that her name suggests. She naturally hangs at a comfy 45 degree angle, and the long upper horn brings the lower frets in close, even with a 35" scale. The small lower hoirn looks like it might be a problem with the bass in your lap, but somehow it isn't--everything seems to sit perfectly.
I wasn't sure what to expect from Alan's asymmetrical neck profile and flat fretboard radius, but it's very comfy. The profile is a bit more extreme than the MTD's I've owned--the closest thing is the Nordstrand SC5 I had, but that was one of my favorite necks. I think Alan has a winner there, as well. I'll probably need to do a bit of adjustment on the relief and string height for my own tastes, but it's really a remarkable starting point.
Tonally, the bass is right where I hoped she'd be, very much in the muscular Wal territory. I asked Alan to include parallel/single coil switching on the pickups, but practically speaking after trying them, the output on the RFB's in series mode is so hot that it makes anything else useless. Possibly Alan's dual-mode pickups address this, but I just really like the sound of the RFBs in series, and don't much like them in parallel or single-coil mode.
I'm still adjusting to the ACG preamp. It's not quite like the Wal preamps I'm used to, but close and definitely more flexible. I'm having a little bit of trouble with high-end buzz, but that may be the grounding in my house. Easy enough to filter most of it out!
Those are my impressions after the first 2 hours with the bass, anyway. I look forward to trying her out in more of a band setting this weekend...
Mike