Wetpaint has some limitations to tables as far as col and row values.
1. There are only two place holders for the number of row/column values that can be be entered. This would mean you could only enter a maximum of 99 in the rows or column windows when creating the table. For Rows that is the maximum. For Columns, Wetpaint will alert you to the maximum of 40 columns per table. This means 99 rows and 40 columns per table are the limitations.

2. After the table is created with the max (99 rows / 40 columns ) more rows and columns can be added by right clicking in the table and selecting add row or add column.

The above is the technical aspect of the limitations. Below are the real life practical limitations.
1. Adding columns above the amount of 40, is not recommended because it would extend the table viewing area beyond the recommended 1024 screen width value set by Wetpaint. This is based on a single 12 point character contained in each cell of the table.
2 Adding more rows, would not have any limitation to the table except one would have to add a row at a time.
3. REAL WORLD stuff here. When tables become large even when adhering to Wetpaint's limitations, the easy editor has a difficult time loading/saving them. On either a save or load, one may expect to see the browser report "not responding" and a spinning progress wheel for a period of time before the page is loaded or saved. Although the page will load or be saved it is quite a pain to sit there and wait for that action to complete. Adding anything other than text to a cell, would certainly extend the wait period. Also, when tables become large it is most difficult to maintain the cell attributes from cell to cell. Example, when a cell is given a certain background color, it remains until it is clicked again then the attribute is cleared. This anomaly, happens with justification, point size, etc especially dealing with intricate tables.

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