[BioC] limma eBayes: how to determine goodness of fit?

[Paul Shannon]

A summary of an lm result includes some readily-understood 
goodness of fit information:

 1) Residual standard error
 2) Multiple R-Squared
 3) Adjusted R-Squared
 4) F-statistic

With limma, and eBayes, I deduce (incorrectly?) that efit$F and efit$F.p.value
convey information similar to number 4 above.  How about the first three
measures -- is there any way to get equivalent information for the linear
model eFit produces?

Thanks!

 - Paul