Well, keep in mind that the nature of reality is one of the big themes running through the series. Is Haruhi REALLY the one doing all this or is it one huge coincidence? Are the characters themselves real, creations of Haruhi, or actors playing the parts they expect Haruhi would want. Etc etc. That it does all this with a sense of humor, and without the usual navel gazing that typically occurs in other series when they try it just increases its entertainment value.
FUCK YES, New episode out! New opening! MORE FANSERVICE!! Today's episode is brought to you by the word: Swimsuits! and also brought to you by the word: Navel!
That's just it. It's never really told. To me, I think this entire show is one horrible dream for Kyon. I almost feel sorry for the twit. ALMOST.
To be honest, i'm not convinced that Haruhi is really the one to blame for all these incidents. In fact, I think that she might exist for Kyon's sake. That Kyon is the force behind it all, rather than Haruhi but he just doesn't realize it. These experiences are things that Kyon really wants but can't admit to it. As much as he complains, I think deep down he enjoy it all.