Hi,
If you could describe what exactly you'd like your vertical bars do, I might try to implement it in Bazooka.
(Do you want only icons, or rotated text, too? stuff like that)
cheers,
mitch
ps: you could do the icon-only thing with creating multiple bars, but that's a pain
pps: you could take a look at Fortress, you can build your "bars" from blocks there.
ppps: I looked around the api, and it seems fairly impossible to do vertical text, so forget about that