There IS a way to find something posted earlier on this blog. Maybe you've not noticed it before but look at the very top of the screen. In the Search box, next to Search Blog, I typed in Music. The obedient little search feature looked through ALL the postings in the whole blog. Up came the postings from 11-17-08, 12-2-08, 12-5-08, 12-16-08, 12-28-08 and 9-11-09.
Now you don't just need to scroll through the titles of all the entries to look for your key word, or even settle just for Command + F. That command only works on what's visible on the screen. Try it, you'll like it!