I\'ve looked, but it doesn\'t look like you can apply specific formatting to just comments.
It may not answer the question directly, but, instead of:
//Writing a really really long comment on one line that should probably be broken up into multiple lines anyhow
Why don't you:
//Break your comments up into multiple lines so that
//you don't need to worry about them wrapping?
Also, I don't like long lines of code - break them up across multiple lines so it's easier to read. All a matter of preference I know, but if you have to scroll horizontally to see all the code, it's a good sign it needs formatting better IMO.