[dang]

YC founders' usernames do show up in orange to one another. This is one of two YC-specific privileges I know of (or at least remember at this late hour) on Hacker News. The other is that only YC companies are allowed to post job ads (and then only through /jobs).

For a while, it was also the case that YC founders could see a list of submissions by other YC founders. But PG got rid of that over a year ago. It turned out to have voting-ring-like effects, which was never the intent behind it.