I have an acount I can do press releases for very cheap, I pay monthly for the service, pm me if you need details
the best social bookmarking software that I have seen is at socialmarker.com and as far as press release software pressequalizer.com both of these I'm pretty sure are one time payments.
it's $24.95, but you can get it for $7 with some coupon code...I forgot the coupon code, try googling...
I personally don't know why people still spend time and money on things like this. Article and press release submissions have very little impact on search results these days. The amount of money and/or time you spend trying to submit to these things can be better utilized creating quality content, networking with other bloggers, and getting integrated with social networking communities.