I realise it's not something your interested in but I think allot of your customers might like to have the option, especially those who are big on skinning like the thousands of members on my site and DeviantArt, allot of those feel the same as me and stick with Windows 7 or 8 because of the more customizable features, at the moment those who want to customize the taskbar use SiB to make the taskbar transparent and then use an old program called Taskbar Color Effects add a single large image or a smaller tiled one, this sort of works but it's a very limited implementation as it ads the image as a background so windows are on top of it and it's a bit buggy.

There are some enhancements Windows taskbar utterly lacks which I would like to see, so I hope we would see some. Most taskbar drawing is now hardcoded and not so easy to change. That's an interesting area to dig in, however skinning just for sake of skinning is not my cup of tea.