Indeed! There were several Penguins at the end of the oughties that wore them: Talbot and Fedotenko as well. About a handful, but that's a lot considering it was still a prototype skate with very little presence behind it. The difference between Gonchar's and Lemieux's skates and the others', though, is that the former are the only two I've seen with the Scott Van Horne build that's reminiscent of a 90's CCM Tacks boot, with the silver heel wedge. Both Gonchar and Lemieux were Tacks wearers, so it makes sense they would use that construction, but it died out after them as far as I can see. Fedotenko, Malkin, and Talbot (as well as Byfuglien and the other early MLX guys) all had skates that resemble the eventual MLX "genie boots" stock look, only with fewer bumper pieces glued on.
I wonder when Lemieux became an investor and how that influenced his players using the skates (or perhaps the other way around or a little of both). It would be an interesting history to hear, especially seeing how big of an impact the Scott Van Horne skate has had on the hockey skate market overall.