Submitting Press Releases to be indexed? Waste of time?

Most of us use something like Omega to submit URL's into Google. I have a recent Press Release which generated 200 articles on PR Sites (i.e. 200 URL's). Would I be wise in submitting those x200 URL's into a tool like Omega Indexer or am I wasting time?

I am referring to mega PR Sites like like Associated Press.....

Surely Google crawls them 50 times a day?