Lube new sealed bottom bracket (BB-UN55) I have a new sealed bottom bracket, a Shimano BB-UN55.  Does it come with lube, and if so what kind of lube would that be?

I assume it's already lubed, because how would you lube it without taking it apart.

There's a little oil on the splines and spindle, but that might just be to keep it from rusting while it's sitting on the shelf.

(This is my first time working with a sealed bottom bracket; up til now it's been all cup-and-cone.)
Cartridge (and threaded external bottom brackets) come properly lubricated with appropriate grease. Just install in your bike and enjoy. 

Cartridge units can’t be disassembled to service the bearings. The seals can be removed on certain external units which allows the bearings to be cleaned and re-lubed.