well, i joined orkut recently, this year in march..& i have to say it rox
i no longer ask my old friends, about my other old school friends, i just search on orkut......chance are, they are there. I found many school friends i lost contact with there, even made a few new friends & it's going smooth with them, cos then i met them in person
the thing is scrapbook has no privacy, it's just for casual messeges, like hi, how r u, where r u, thats it...not for chatting, u can't talk to your gf on scrapbook trust me
Scrapbook can be made private, with just a few changes, which i have even given in orkut feedback, but till today there is no change
& spam, yeah, i hate those messeges, half page long, speacially that "sorry i hacked & deleted your scrapbook <long space>" thing. i just delete those
if orkut is taken down, don't worry, 10 more sites will arise, they concept is out in the wild now. It just need few changes & it will be good. i guess scrapping alone made orkut famous