This is the premier place to blatantly beg for an invite to Orkut. For those who have not heard of this lesser spoken of network, Orkut is basically Google's version of MySpace. The interface is nice enough, profiles are more thorough than MySpace, and users are not able to make their pages look like total crap. =)
If you would like an invite, you would be best off to make your own post, rather than simply replying to someone elses. Your request will be more likely to be noticed this way.