Endless 8... I love it!!! I think the name implies that there will only be 8 of them, meaning this week's episode will be the last, but of course I could be wrong.
The episodes aren't all the same though. As they progress, Kyon's feelings toward Mikuru and Haruhi change. In the first one he is very angry to find out Koizumi has been with Mikuru, but in the latest one, it hardly bothers him. In the first one he doesn't really care when Koizumi says that he could say "I love you" to Haruhi, but in the latest one Kyon is very visibly angry about it.
Also, the anime isn't an original series, it's based on a series of books. Though, it wasn't quite as repetitive in the books I think...
Edit - Shazaam, posted after only reading Mammy's initial post and didn't even notice that there were already 3 pages... Blah...