Here's a cool feature of your Windows Phone.
Anywhere you have editable text you can rotate between sentence case (first letter uppercase), all caps, and all lowercase by selecting the word, phrase, sentence, paragraph etc. and tapping the SHIFT key. Each time you hit the SHIFT key it cycles through the available formattings. This may also be a feature in Office for iPad/iPhone if anyone would care to confirm. There's a small bug that I found; when expecting it to uppercase the lowercase i (the pronoun) to I, it fails unless it's the first word in the sentence. Bad Microsoft for including such a cool feature, hiding it, then FAILing.