I have Adobe Profesional 8.0 that has been just fine so far for working with the newsletter. But Snow Leopard broke it and all Adobe wants to do is tell you to buy it's new $500. product.
No thanks.
I found a $35.00 PDF shrinker, but even better I found a work around. You can still open the front end for Adobe Acrobat Professional. Just save the file out as a PDF, open it with Adobe Professional 8.0 and then you can either optimize the file, or do a file size reduction. I have found that either way yields a compressed pdf file.