Could you share the screenlets and how did you get the panel? Lastly is it possible to achieve the same results if your using linux mint 12 because I'm about to a fresh install of it my self and I would really love it if I could get my new setup looking like this.
None of these are screenlets The panel at the top is Launchpad Conky, [link] which I edited to how I like. The clock in the bottom right is HUD Conky, [link] The album art in the left hand corner is Covergloobus, the theme is Magnifique, [link]
I actually found conky to be a real bugger in Gnome Shell. You might be better at working the configs than me and might not experience any probs.