Well, there's that one background image ("dropzone_repeating_pattern.png" in both; I'm not sure of the original source for this image). But otherwise it seems

Well, there's that one background image ("dropzone_repeating_pattern.png" in both; I'm not sure of the original source for this image). But otherwise it seems like a sort of standard JS-GUI interface, and not all that much exact overlap in functionality beyond commonalities you'd see in anything that tracks tasks through stages. FWIW, it looks like BetterMeans is using JQuery-UI and PivotalTracker is using YUI, and I don't notice any commonalities in their source with a quick review... so it may well just be mostly that bg image (which they may have both gotten from a common & free source). Dunno if you see a smoking gun somewhere, but I haven't thus far.