I snagged up this picture from a blog that posted on TMP awhile ago. The UNE Superfortress is the marquee piece from the halcyon days of LOS lore. It's gigantic, a couple a pounds of lead, and may require membership in the ironworker's union to assemble. Truth be told, I've never seen one on a battlefield.
This might be a better option for it.
There is a beautifully painted Superfortress, surrounded by 15mm sci-fi minis. It does give the unit the mecha-quality that it has always demanded. The weaponry on it's left wing isn't stock, but a little customization goes a long way.
I'll try to find the guys blog to give him proper credit.
(Edit: Found it! wpggamegeeks.blogspot.com )