TableEdit makes for some friendly table editing, although its not entirely intuitive to use. Some notes to ease frustration:
Gotcha: Tables cannot be created during page creation. Save your new page first, then edit it to add the table.
To create a new table, you just need to define a series of column headings, like so:
<newTableEdit> Heading1 Heading2 Heading3 </newTableEdit>
Here is a table you can play with. If you break it, feel free to delete and start again.