Another Blondie mention I missed: Monday's installment of The Duplex. Thanks to Alex Krislov for letting me know.
In other news: Today's Dilbert doesn't mention Blondie in either of its two versions. Apparently, the joke Scott Adams wanted to do was one that some editors might not want to run so the strip was distributed with two punchlines. Here's a link to one version and here's a link to the other. You can decide for yourself which is the more "sensitive" last panel.