I have tried five times over the past three months to get my plugin (which actually does something pretty cool) added to the WordPress plugin repository, to no avail.
I have submitted the plugin five times using the "plugin add" form. The first few times, my request would be deleted within a day or two. I emailed Matt Mullenweg directly, submitted feedback through the support channels, even left comments on some of the Automattic staff's blogs trying to get through to somebody. I have contacted other plugin writers, who have told me that it usually takes a week or two, but they have never had problems getting their plugins added.
It sucks to be ignored. I worked for months on this plugin, and was really excited about having other people check it out. I feel like an idiot for spending that time inside coding when I could have been out with my friends and/or girlfriend.
I'm not sure what I'm doing wrong, if anything. I don't know if Matt and the Automattic staff object to my plugin for some reason (I don't know why they would), because I'm not getting a response from anybody. But the whole experience has left me pretty disillusioned with WordPress and it's claims of being open, community-driven, and extensible.
So, until I hear something from somebody, I officially give up on writing plugins for WordPress.