There are a few interesting portals in Israel, trying to cover a wide range of topics, from politics to music and nightlife. Israeli's are well known for being fond of leaving comments everywhere, about almost anything you could ever imagine. It doesn't matter whether the person understands the topic he is commenting on, as long as he has something to say...and unfortunately, everyone in Israel has something to say.
Personally, one of the websites i really like, is 1909.co.il- the site's content is brought by readers who share their thoughts and interests and is maintained by some very cool web junkies that seem to know exactly what they are doing.