Ask HN: What sort of traffic can you expect from the HN front page

Hi all, I'm about to submit one of my apps to HN to get a bit of feedback. In the unlikely event that it reaches the front page, I'd like to get an estimate of what sort of traffic I might expect. Basically, I just want to ensure that my servers can handle it, hopefully with a bit of room to spare! Anyone have any data/estimates they're willing to share (even anecdata will do!)? Thanks very much!