Color me boring, but it's: Bottom, not hid. I think that the location is just a throwback from my Windows days. For me it's like Pavlov's Dogs - when my apps are open I simply expect to see them at the bottom somewhere (in other words, I left the 'Start' bar where it was on the Windows platform too).
W00t. I think I get change back on .02 cents for that one.
I have mine along the bottom, with no hiding, but pegged to the right-hand corner. If i had it on either of the sides, the icons would be too small to make out.
mines on the left starting at the top via tinkertool...ie, it is not centred on the left...apart from that, its just the standard colours 'cause I haven't gotten around to transparing docking it...