The Windows 7 superbar is great, minus a few exceptions.
I kinda hate the fact that sorting of taskbar items are grouped by application. Although you can sort within the same group, its not usually helpful.
Also, I prefer to have the right click as it used to be instead of the stupid jump menu. To get it to show up normally, I'd have to hold Shift and then right click.
Luckily some clever chap called RaMMicHaeL created a funky little program that does just that and a bit more.
You can also disable aero peek (if you don't like it) and change the behaviour when you drop files into the taskbar.
It works in both 32 and 64 bit flavours and has worked wonderfully for me for over a year now without any bugs.
[ Download page ]