AOL TV has a list of the top ten longest running TV shows. It's a great trip down memory lane or if your a product of gen-Y like me, it's a good history lesson. I knew one (just one!) show on that list. I thought The Simpsons would be first for sure. Turns out that show is number ten. At least I got one.

The Simpsons has been on the air since 1989 and is still running. AOL TV summed up the animated show's success: "Spawning multiple catchphrases, iconic characters and a 2007 hit movie, FOX's pop-culture cornerstone satirizes overall society." And to think, Jennifer Tilly (once married to Simpsons producer Sam Simon) didn't predict that the show would do well. I remember watching a documentary on poker of all things (Tilly is an avid player as is Simon). She said that she didn't see the allure of people with yellow faces.

My other guesses were even more off-base. The Real World! Friends! Seinfeld! Check out the rest of the list and see how you do.

TV Squad will be having extensive coverage of this week's network "upfronts," and I thought I'd take this spot to explain exactly what an upfront is. Basically it's the week when each network reveals its fall lineup. What new shows are coming on, and what old shows are being canceled. Each day this week we'll have the rundown as each network unveils their lineup. Here's the upfront schedule:

• Today: NBC
• Tuesday: ABC and WB
• Wednesday: CBS
• Thursday: Fox and UPN

Keep checking back throughout the week for breaking news...