Remarkebly usefull. As you might have discovered, Digital Photography Tutorial is made with the excellent blogging tool Wordpress.
As our team is completely dutch, we don’t master the English language into perfection. Checking spelling meant checking word by word in a dictionary or getting it into Word. So we were very happy to see the spelling check of Google Toolbar functioning in the edit screen of Wordpress.
However no grammatical and sure no semantic check. So you’ll probably still see some awkward glitches here and there. But the Google Toolbar turned out to be remarkably useful.