I haven't heard the official word on this one, but I noticed their absence on the product page as well, and I'm assuming they've been discontinued. GC is certainly blowing them out like they are. And I have to say, if that's true, while I love mine, I'm not entirely surprised. The import amp market is a tougher game than import guitars, and I will admit that in some ways, I don't think PRS was ready to compete. Which is definitely not to say they were bad amps, but when you have to play ball with Fender, Vox, Marshall, Mesa, Egnater, Blackstar, Jet City... you're talking about some serious contenders. Most of those brands have pretty widely palatable tones and are very affordable. The relative quality and value of the SE guitars is almost indisputable compared to Fender, Gibson/Epi, etc., but amps are a different story.
One thing is the tone, the EQ could've been perfected a little more prior to release. They're great sounding amps in many ways, including my playing style, but they could've gained a broader fan base with an EQ character that was more versatile. Also, the preamp gain sounds a bit fuzzy unless you've really opened the amp up, and let's be honest, a lot of people buying budget amps are bedroom players, and they can't turn even a 20 up that loud.
Next there's cost. $900-1000 isn't a bad price, but look at the long list of proven amps you could get on that budget, or in many cases less - Mesa TA15, almost the entire Egnater line, the entire Fender Hot Rod line, Jet City, Marshall DSL, not an easy market to push into.
Now my SE amp isn't going anywhere, but I think I'm a bit of a unique, and I'll go out on a limb and say savvy, consumer in this part of the amp market. I have a somewhat limited budget, but I've also been through a fair share of amps. Enough to know that a good amp needs good transformers. Enough to know that cheap components can literally burn up unpredictably. Enough to know that quality stock tubes make a difference, and aren't cheap to upgrade after the fact. Enough to know that a small cab or junk speakers can ruin the tone of an otherwise great amp. Enough to know that I will change power tubes, biasing is expensive to have a tech do, and those external test points will save me hundreds over the life of the amp. These are lessons I've learned in the budget amp arena, and when you've been around that block a few times, the SE amps start to look pretty darn good. But if I had less experience, I would buy up another amp, not so carefully designed, and not have any idea what I was missing.
Luckily, I did have these insights when the SE amps hit the scene. Try to find an amp under a grand with two independent channels each with full EQ sections, spring reverb, quality JJ and Tungsol tubes, external bias test points, heavy duty iron, level selectable effects loop, and bulletproof construction, they just don't exist! So the SE amps are an easy choice for a discerning player on a budget. For me, the tone has been pretty good too. I've added a couple of minor tweaks via my pedalboard, but I've found that a pedal or two is no big deal compared to paying for tubes, maintenance, and repair on an amp that isn't as intelligently designed.
These things I've picked up on are things that I don't think are on the mind of John Doe budget guitarist, which is why the SE amps haven't been hot items. I think PRS could re-engineer the line and be successful - a 5 watt, single channel amp, a similar 15, and the current 30 and 50. Find a way to sell the 5 for $350-400, the 15 for $500, and get the 30 and 50 down to $800-850. Tweak the EQ a bit as well, and they could be big sellers.
Sorry to make a short story long, Les, but it does seem the SE amps are no more, and I figured I might as well throw in my 2 cents!