how fast is your typing speed? that might affcet which one to get... poeple can get pretty fast on thumboards... about half their normal typing speed.
There are a few options for you:
http://www.fitaly.com -- a fully customizable ergonomically optimal tap keyboard, I can type about ~45 with this, I can type about ~110 with a foldable, I hvaen't actually used a thumboard, but it is pretty similar to FITALY in terms of speeds I believe
Pocket Wrod is basically a rich-text editor, with a few extra features like zoom, drawings, and support for Rich Ink and Audio embedding.
It also support paragraph indenting (enter a value for first line, hanging, and left and right indent) It also has basic list functionality.
However, if you want a word processor with about Word 95 or 97 functionality, customizable hotkeys, customizable toolbars, full text maniupulation a million and one ways, and losless integration with even the most advanced docs,
http://www.softmaker.com, get Text Maker.