It does actually serve as quite a nice reflective tool too. Doesn't include comments though I don't think - I copied and pasted the word sociology about 30 times into a comment on one of my other posts... no effect on the word cloud. I need to reduce the numbers of 'b@asicallys' too.
I love wordles in general... if you like to use them more broadly, this is the best one I've found - it has quite good functionality for free - you can specify the sizes of words, do different shapes, select single or repeat words. I've tried a few of them, this is the best (doesn't top google rankings but it is!)