Season 9 has been rather underwhelming so far, I watched the Puerto Rican Parade episode the other night, and there wasn't anything to highlight in it. It was pretty dumb with the stalled traffic, laser pointer guy annoying George and Elaine playing some sort of Harriet Tubman caricature. Most of season 9 has felt like a significant drop off in quality from seasons 4-8, but the notable episodes I liked were:
The Butter Shave (George gets a job due to his cane, nearly talks himself out of it until the 'private bathroom' is mentioned, Kristin Davis dates Kenny Bania, Chris Parnell thinks Kenny should make a NBC sitcom)
The Voice (bellybutton talking, George keeping his job after faking being disabled, Kramer gets a assistant)
The Strike (The Human Fund is created, Kruger comes to Festivus, Kramer works at a bagel shop)
The Burning (Kramer and Micky act out diseases, Elaine learns she's going to Hell)
I'm up to the finale now, which I haven't seen since it aired back on May 14, 1998. I remember not liking it very much, because it wasn't much new material (rehashing old stuff doesn't count a week after a clip show), and the premise of the arrest was completely unbelievable. I'm still interested in watching it for fun, but don't have my hopes up at this point. They really did pick the right time to go out on a high note overall, and end the series when it was on the decline.
I will say, I did enjoy the hell out of the clipshow, which was the penultimate episode. They did a great job with carving out themes, montages of similar situations and revisiting the most epic moments of the show. I normally don't like clip shows, but that one was so well done. It really does a great service to saying goodbye to all the characters in a fun way and reminding you of all the good times we had.