Press release : single or multiple root domains

[echo1]

The question is: if press release is part of your link building strategy, what would you do:

• upload one or two every month using one website as Dr Pete (Seomoz) suggested in an older blog entry?
• upload one or two press releases every month but on different domains.

Suppose all you want is backlinks and you have 40 unique press releases ready to be uploaded, would not be better to get those backlinks from different domains versus just one domain?

[AaronSchinke]

Depending on the content and original network it was distributed to it should spread to different domains anyway, the key is finding a quality distributer. Never hurts to supplement with a free service too.

[echo1]

Do you  have any good results with any of them? Would you recommend any?