Don’t think its supported out of the box. Will create a story for it and dig in deeper. Is this urgently required, or a nice to have ?

Actually, I take that back. It’s supported pretty nicely. There a page with good textile examples that is worth looking at.

Multi column cells

|\2. spans two cols |
| col 1 | col 2 |

Will turn out as:

Multi row cells

|/3. spans 3 rows | a |
| b |
| c |

Will turn out as:

Amazing. Thanks.

OK, I need a little more help.
Some examples on the page you have provided use embeded html, like this:

I am <b>very</b> serious.

And it must looks bold, like this

I am very serios.

But i get all tags escaped:

I am <b>very</b> serious.

Shure i dont need the "<b>" tag but some others are very useful (br, hr, etc).

There’s a good reason for escaping HTML – its to avoid XSS vulnerabilities. However, things that can be used are span and br.

I see.
Thanks for your work on xp-dev indeed.