which internet portal is best for promoting your work? blog or website?

It depends what kind of work you want to promote. Many big corporations have incorporated a blog to their main website as a blog come across as more personal in engaging your clients and audiences. Therefore, the suitability of blog or website really depend on what kind of work you want to promote.

A combination of both, I use blogger and hubpages http://hubpages.com/_writeapage free blogs can generate just as much traffic as paid websites, although you may be limeted on some of your content with a blog a website with godaddy is fairly reasonable, check my profile and get one through mypowermall to make it even cheaper.... squidoo is one i use as well but it seems i get way more search engine hits at hubpages.