WordPress.com made "stats charts" super sexy with "Flot," made available on mobile devices such as iPhone and iPad, bars taken place.
"Each module can be opened and closed, moved, or hidden completely. If you don’t want to see a module, minimize it with one click or use Screen Options to keep it out of sight. Customize everything and view stats the way you want to. As you hover over each bar in the chart it changes color and displays a tooltip, giving you more information about the data. If the chart is showing data by day, Saturdays and Sundays have a light gray background to make it easier to see weekly patterns. Under the chart you'll notice "fortune cookies," where we'll highlight key stats."
Each day starts at zero and we think bar charts work much better for this type of data.
Self-hosted WordPress blogs usig Stats Plugin will soon see updates.