Photogs, graphic artists-are you using PNG?

[DP]

I have been talking with my client about the different formats they require for the images I shoot for them. I have been looking at using PNG to replace both TIFF and GIF formats that they use. I am doing some tests for them and when I save an image as a PNG I get the option for "interlaced". Doing some googling it seems that interlacing is the right way to go but no source ever says, "Yeah, always choose interlaced".
What say you?