A visit to the Blogs of Note always reveals an interesting blog. Thats where I discovered the French Toast Girl listed in the favourite websites list. Another interesting one, Letters of Note, sources interesting letters written by people - famous and not so famous and compiles them in different categories.
Beethoven's letter to his brothers is on the homepage. Also click on categories. I clicked on love, and found a love letter by a mother to her new born child. Another by painter Frida Kahlo to her husband Diego Rivera, and Winston Churchill writing to his wife Clementine.
Do check the blog