trying2win2, just for future ref, you can center an entire table:
Code:
<table align="center"><tr><td>bla</td></tr></table>
...but this doesn't affect the cell data in that table.
You can also use the vertical align attribute in the row tag, by the way.
Here's an example with all three atts used:
Code:
<table align="center"><tr valign="top"><td align="center">bla</td></tr></table>
A better way to control alignment would be css (text-align:center

although there's no css substitute for the valign attribute.