There currently aren't any configurations in Butsu (and possibly never will be *gasps*). You can move the frame by holding down <Alt> and dragging it however. It will position itself under the mouse if you have that selected in the Interface options.
oTweaks is far from done however, it was just what I managed to write up before I went to bed yesterday.
edit3: found problem: doesn't work with ouf + ouf_industrial layout... damn.
r383 should be able to fix that just fine, but I'll take a look at it.
(It's oUF which is killing of the targetframespellbar, so it will happen regardless of layout. Industrial's layout doesn't touch the targetframecastbar for example.)