Pretty good, as celebrity-centered episodes go. It struck me as having the feel of a much older episode, possibly in part because there were many gags reminiscent of (but not directly referencing) earlier seasons. I was tickled by the (fake) old comedy albums, and the random but funny Blockbuster return. Also, I found it amusing how the preexisting piles of junk proved very attractive (to Marge and then again to Eleanor) - as a bit of a packrat myself I would bet that the semi-organized nature of it all, combined with the way a collection is more significant than a single item, would make all of it pretty hard to pass up.
I was really wondering about the title, though. There was no dream (not even a "lifelong dream" of doing a comedy tour), and it was only implied to be summer partway through act 3. Not until the end, with Bart's Puck monologue, did it make any sense - I wonder why it wasn't framed that way at the start too.
DYN: ...the TV-14 (DL) rating pops up again? (Gee, I wonder why.) ...new Lisa solo for the first time in nearly a year? (Like the last one, it's on a trumpet!) ...the old news clips of Cheech and Chong on channel 6 are appropriately presented in 4:3? ...Very Tall Man appears? ...Lotso (of Toy Story 3) appears in Marge's mess? (See also Up house in LABF12, Wall-E in KABF21/NABF07, various Pixar knockoffs also in NABF07, LABF04's "Ratatooey" bootleg... and so on) ...the "4 seconds of Simpsons theme instead of stretching the bit" end credits style is back? Ugh.
Previous episode stuff DABF11: A bit of a marijuana focus 9F16: "Homer's not here, man" at the reunion in that episode AABF02: "Let your freak flag fly" phrase used (also drug themes) 7F11: Cat lady's old answering machine message is her version of the classic Beethoven's V "nobody's home" DABF06: Skinner's comedy ambitions
Goof How did the old answering machine play from the back of the truck (without being plugged in)?
Meta -To explain Cheech and Chong to Bart, Homer mentions they were the Beavis and Butthead of their day - and Bart doesn't remember them either. Funny in part because this show predates that and helped pave the way for it (or am I just assuming it did because of Judge's creation of KOTH?). At least no one asked who the Muppets were. -Bart trots out an "ay caramba" in a talk of old catch phrases.
Note I have no problem with the format of the episode's title, because it only makes sense this way, but as a big Jeopardy! fan in particular I feel I must mention that the Shakespeare play is "A Midsummer Night's Dream", and you will get ruled incorrect if you say "A Midsummer's Night Dream". (Speaking of things necessary for the joke: the adjustment in clocks that starts today in 2011 is Daylight *Saving* Time. I actually didn't learn that it isn't "Savings" until a few years ago.) Now you know. You probably did before.