Alex Kaminski I just added this feature and submitted the new version to Apple. It's currently under review and should be available as soon as they approve it. (Usually a few days).
Alex Kaminski I didn't add decimals because I thought people would like the simplicity of a phone-type keyboard better.
To enter decimals you need the text-keyboard to get the period...
However, since you requested it I might add this in an update and add a settings tab to let you choose what type of keyboard you would like. Would you like this feature?
Meanwhile, here's a screenshot of the new version: http://i35.tinypic.com/2ahe9v9.png
Let me know if you have any other suggestions or feedback!