I wrote:

Everyone's getting into the habit of using the html5 placeholder attributes on form inputs to tell users what the inputs are for, decreasing usability for the rest of us, so I implemented it for INPUT text/password. (It's also legal on TEXTAREA.)

Here's the code for textarea. I don't expect to commit this one as quickly, since textarea placeholder doesn't seem to be used as commonly. http://www.dillo.org/test/textarea_placeholder.diff