The Holga lenses for DSLRs are disappointing - most of the holga flavor comes from the edges of the image - the crop of even a full-frame 35 sensor takes the mojo down a lot, and APS-C? Just looks like your lens needs cleaning. (They're pretty cool to make a funky tilt adapter though, plenty of coverage for a DSLR).
The article states $75 - you can see they're using a fairly small sensor in the sample shots - "vignetting" is one thing, this is pure sensor overshoot.
What did give me a big smile - no preview screen. You don't see the shots til you get them on your computer. Certainly keeps costs down, and I like how that does make a "digital holga" seem like a true holga, as much as it can with digital anyway.
Holga haters gonna holga-hate, I get that. But every time Wolfgang Moersch posts a lith print of a Holga neg, I think "hmmm, maybe I should get one of those"… in the right hands they can do some beautiful work, and nothing is quite like 'em (OK, a Diana or maybe an old vest-pocket camera…)