I think I "kind of" understand what your saying. What your missing though is how the blog module works. I've recently started my own blog to learn it better.
You are not thinking of it modularly enough. the "blog module" comes in a few pieces not just one. The main module you are looking at I think they call the rollup, this is where you actually see the content. This post www.dotnetnuke.com/Community/Forums/tabid/795/forumid/92/threadid/6068/scope/posts/Default.aspx explains the module names and what securities that should be applied.
Back to your question though. the "menu" portion of the modules, contains a list of the actual blogs. The rollup contains first a summery of the last few blog posts, then if you click a blog it shows the blog headers basically..name, summery, and a read button..then it changes once again to actually content of the blog entry, among more things like morphing into an editor.
So, the question you are really asking I think is "How to I get a link to the full artical"...And it's pretty easy..Once you have the link, I would put it into the links module on the main page. I'm sure there is a more sophisticated way to acomplish your goal than I'm about to recommend, but sometimes complex things are better understood of you take babysteps.
So...Click the blog title link from the menu and you get this: http://www.martinwebhosting.com/Blog/tabid/125/BlogID/16/Default.aspx in the address bar of IE. The link to the blog!!!
Click "Read More" on the blog and watch your address bar again..You get this: http://www.martinwebhosting.com/Blog/tabid/125/EntryID/33/Default.aspx
A link to the actual artical!!! Paydirt! :->
pop those in a link module and you have a temporary solution until you find one already made, or help make one :->
Have fun...register on my site and we can kinda bounce ideas off each other as I"m a total newbie and learning stuff every day.