I use the subscribe2 plugin. If you look at view-source you'll see
HTML Code:
<table>
<tr>
<td colspan="2">Your email:&#160;</td>
</tr>
<tr>
<td colspan="2"><input type="text" name="email" value="" size="20" />&#160;</td>
</tr>
<tr>
<td><input type="radio" name="s2_action" value="subscribe" checked="checked" /> Subscribe <br />
<input type="radio" name="s2_action" value="unsubscribe" /> Unsubscribe &#160;</td>
<td><input type="submit" value="Send" /></td>
</tr>
</table>
The "Send" button is in a second cell in the same row as the radio buttons. I don't think you'll be able to change the style to what you want without hacking the plugin's code.
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