You can not compare Jazz2Online with Haze's Hideout. Because the concept of the two sites is different: while Jazz2Online is interactive and kind of a "meetingplace" for the community (esspecially the downloads and the forum), HH provides basic information about the game, and non-homecooked downloads like SW versions etc.
However, in my very personal opinion, the value of an interactive site like J2O is higher, because it can keep a whole community alive. Nevertheless, HH is awesome (and by the way, i think it is not completely unlikely that someday at least parts of HH will be integrated into J2O).
And on a last note, if we talk about the three remaining real good Jazz sites, we should not forget about LoriCentral by DrJones.
Happy weekend y'all.

P.S.: I disagree with Moonblaze and Craccoboy. The J2O links and also the forum are very, very useful (there is a lot of interesting information in General J2 Talk, JCS talk and, for example, Tech Help). On the contrary, the pictures section can not be considered useful, but a nice and sometimes funny gimmick.