EDIT: Oops, didn't know that Darin had already posted the answer
No, you are right, HTML is not enabled... The trick seems to be to avoid any new lines within the table definition (or only do new lines after the table data, which Darin pointed out), as seen below
Here is some more text
Here is some more text
Here is some more text
You can see the difference in the code below:
HTML Code:
[table][tr][td]This[/td][td]is[/td][td]table[/td][td]#1[/td][/tr][/table]Here is some more text
[table][tr][td]This[/td][td]is[/td][td]table[/td][td]#2
[/td][/tr][/table]
Here is some more text
[table]
[tr][td]This[/td]
[td]is[/td]
[td]table[/td]
[td]#3[/td][/tr]
[/table]
Here is some more text
(Another trick is to use the [HTML] tags around the BB code to prevent it from being parsed)