I would be curious to know what alternative folks recommend for people in this situation.

That is, people working full-time as mid- to senior-level professional software developers, who have no formal CS training at all and would like to rectify that with a formal course of some sort.

I recognize that going straight to graduate school probably isn't the best plan, and I'm not particularly interested in endless months of self-study (or more accurately, I admit it probably won't happen without more structure).