I am not exactly sure the minute differences between all of these, play around with different alignments and see what does what. I think this property is one of the neater properties that I probably will never use. The property can transform the text to all uppercase, all lowercase, and capitalized. I'll probably never use them, because I would just type the text how I want it, and wouldn't need a style sheet to control it, but it may be useful somehow. This probably should have been called horizontal-align, since they have a vertical align, but my guess is that that is to hard to spell and type in numerous times.
Valid values are length and percentages.
This property will indent the first line in a paragraph, the sepecified length or percentage. This allows you specify the height of a line, which will allow you to specify the distance between two lines. I found this a little tricker to use, it doesn't work well as an inline property, I found as a paragraph property works pretty good.