If you're a startup doing something fairly unique, there's always my Startup Challenge web show to apply to. Somewhere along the line, I may ask you for an interview for my normal podcast. If your plugin has a strong alternative, we may cover it on our show PressThis.

Lastly, but surely not least, I will also do a review/unboxing on my blog if you contact me directly and certain criteria is met.

I know there's other WP outlets out there that will also do reviews -- best to reach out to all of us :)