I put this in the header of an empty page and modified the page menu to point to this page which in turn points to a category (the url being the url of the blog category)
<a href="YOUR BLOG URL">Home </a>
this works perfectly, except that the page name in the page menu comes out larger than the rest and causes a misalignment of sorts...
wonder what this can be attributed to? there s some discussion of this in the wordpress forums