If you use a TextareaField object and make it readonly with $fields->makeReadonly() the content (saved priviously in a writable form) shows it without any breaks. It should call nl2br() before printing.
I'm sure this is the kinda thing that silverstripe would great appreciate as a pull request :)
ok, great give me the link ;-)
Hit the "New Issue" button. Please review...
ok thx swaiba