I quite like this version of what blogging is about and for:
When a learner sits down and blogs, she/he is engaging in a reflective process. Nebulous thoughts and feelings are put to words. External ideas are scrutinized. The natural capacity of harmonizing our emotions and thoughts with ideas and concepts is evoked. A small cognitive and emotional oasis in the desert of busynes[s]. And, I imagine more learning occurs in only a few minutes here than hours any where else...
(from Siemens' Connectivism Blog, a real treasure)