Reviving this thread three years later because the sorry saga is still going on, and with a new twist. As of early last year Darrin Huff started a new company called Zeller Guitars, for which he's building boutique guitars rather than boutique basses.
No, that does NOT mean Darrin has completed the overdue basses. According to him, he still has around 20 outstanding, with the oldest being ordered back in 2002 (mine was ordered back in 2003). He stated that the only way to finish the overdue basses would be to quit his day job to work luthiery full time, and the only way to support himself financially while doing so would be to build a batch of Zeller guitars, because income from the half-paid-up-front overdue basses (fully-paid in some cases) would not cover expenses.
I'm not justifying the logic, just reporting it. He basically said that this is the only path for him to get caught up, and we'll all just have to trust him to keep his word that he won't abandon the long-overdue Huff bass orders in favor of Zeller guitar orders.
On that note: his most recent promise, back in early February, was that all overdue basses would be complete by his birthday, May 15 (I assume he meant 2019 but he didn't specify). This implies that the first batch of guitars would also be complete by then. I've seen progress on his Facebook page (his personal page and D Huff Guitars page; I don't think I followed his Zeller page). Almost all has been guitar work, not bass work -- but no completions that I've seen.
The Talkbass thread linked in the original post is still active, but it's an extraordinarily long read, even just the past ~15 months when the latest twist began, so I figured I'd provide a TL;DR.
P.S. Yes, legal action has been researched pretty thoroughly. In short: it would be tough enough even if statutes of limitation weren't a factor, and you can't get blood from a stone. I've chalked it up as a $2500 lesson learned, and have never been willing to throw good money after bad (and I happen to live on the opposite side of the US from Darrin).
P.P.S. I'm not saying there's absolute zero chance I'll get my bass, but how optimistic would you be after 16 years?