[R-sig-ME] lmer predicted values with a subset of random effects

[Daniel Ezra Johnson]

Is there a fairly simple way to manipulate the "mer" slots to get
predicted/fitted values which include only a subset of the random
effects BLUPs? For example, the predictions at one or another level if
the effects were nested (as in nlme), or with one or the other of
crossed random effects?

Thanks,
Dan