1 Tight labor markets, through activist fiscal/monetary policy ("democratic money") and a shorter work week (cf. the Sandwichman);... that I don't think of as really "populist" at all, but just the sort of thing that people on the center-left would be logically advocating as a matter of course. #2 and #3 would be excellent ways of turning the right's self-serving obsession with entrepreneurs back on itself, making it a useful Democratic tactical tool. It would probably stand the test of economic analysis too- while it would probably raise the ire of market fundamentalists, I don't see anything here that would offend, say, pre-NYT Krugman. Any of the four can be taken too far, of course, but the absence of them usually leads to problems as well, and there's a difference between the kind of procedural problems that can be fixed with some fine tuning and those that are intrinsic to the very concept.
2 Easy entry to entrepreneurship, through fair and easy credit (democratic money again), and through vigorous policing of predatory corporate behavior of all types;
3 An ample social insurance system, that among other things makes the choices among employment and self-employment more appealing (through public provision of health care, among other things).
4 Labor rights -- the counterpart to anti-predation activities with regard to corporations v. small business...
(Heck, if you think about it, these sorts of proposals really amount to fine-tuning the markets' effects on society themselves.)
Anyway, this is only one part of what is overall an interesting article on populism (although I still don't quite agree with Max's fairly narrow definition of the term- anti-elitism ain't just a political economic phenomenon.) Interesting stuff, and yet more proof that Max's is one of the more important left blogs out there.