xtable in Sweave works awesome, but does one table per regression. You can feed it a data frame, too, so I have been manually rbinding
Here's one more options I saw go by CRANberries that reminded me of this question:
texreg — Looking at the vingette, it seems to do a really nice job of generating pretty standard regression tables in R and which is under very active development at time of writing.
Update: I've been playing around with a few of these and I think that over time, texreg has become the leader leader in this space in terms of it maturity, stability, and featurefulness. Most important to me, it works with a variety of models and does wonderfully handy things like bootstrap standard errors to build stars for lme4() models — something that the package itself makes a little tricky to get (for good reasons) but that reviewers and journals often demand nonetheless. I would strongly recommend using texreg. It seems to be actively maintained.