[BioC] tweaks for the heatmap ()?

[Simon Lin]

I am looking for two tweaks of the heatmap function:
1) a choice to order the genes by 1-D MDS projection. The current 
hierarchical clustering flips many nodes.
2) a color bar at the side to indicate the color scale, as with maColorBar() 
in the marray package

Any code to share?

Thanks!

Simon