I think you are absolutely right. Speech found in blogs is not "money" as defined under the Buckley decision because Buckley held that money was not speech because it was the symbolic act of giving that was speech and the amount given was therefore immaterial. Here, there is actual speech in a blog and no law or regulation could reach a personally drafted blog post which stumped for a candidate.
On the other hand, there is no reason that the click-through ads which are becoming a part of our everyday Internet experience shouldn't be regulated as a TV or print ad. There is no difference between the media and such ads should be regulated.