multiple links from same domain to different pages on a site

Hi,

I've got a question about links from the same domain to multiple pages on your site and how that affects rank.

I'm new to this and it's confusing me a bit so I'll give an example.

You have a review blog called myreviewblog.c0m. You now sign up to a web2.0 site and place an article there with a link to myreviewblog.c0m. The next day you create a new post on your blog called myreviewblog.c0m/widget-vs-widget-comparison.html. You go back to that web2.0 site and place a new article there with a link to myreviewblog.c0m/widget-vs-widget-comparison.html. You now have two links from the same web2.0 site to two different pages on your own site. Will link juice be passed to both pages on my site even though the links come from the same domain?

I'm sure you know why I'm asking. There's several softwares around like SEO Link Robot, SENuke, etc. that sign up at ~30 web2.0 sites which then link back to your site. What happens if I now write a second post on my blog targeting a new keyword I want to rank for? I've just got the same ~30 sites linking to that post. Now I write a third post, fire up the software, and I've once again just got the same 30 sites linking to that post. It seems like all I've got is 30 links.

I'm interested in getting one of these softwares, but I'm a bit confused about that. Will the second, third, fourth, fifth post that I write still get link juice from these same web2.0 domains to help rank those keywords? To my thinking, once I've signed up at a web2.0 site and sent a link from it to myreviewblog.c0m, when I then later fire up the software and send a link to myreviewblog.c0m/specific-longtail-keyword-article.html, I won't get link juice from that. Or am I wrong?

Would appreciate your thoughts. Thanks.