[Seaside] Tags in user input

[Zulq Alam]

I'd like to render some tags in user input. So, if the user entered 
'some text with some <b>bold text</b>', I'd like to render this 
appropriately when it is redisplayed.

I only want to allow a subset of tags. In fact I'd really like to play 
with the syntax, perhaps use email conventions like asterisks for bold, 
underscores for underline.

Has anyone done this or something like this? If so would be interested 
to hear your experiences.

Thanks,
Zulq.