R + LaTeX formula

Hi,

what is actually the best method to include R-plots into LaTeX documents?
At the moment i use 

postscript("myplot.eps", width = 12.0, height = 9.0, horizontal = FALSE, 
onefile = TRUE, paper = "special",encoding = "TeXtext.enc")
plot(foo,bar)
dev.off()  

But it is a bit unhandy to scale later and its difficult to get nice 
formula in the plots.

And how should i write formulas on the axis or at specific points? 
Has someone had some effort in exporting plots to pstricks or pictex?

kind regards and thank you for reading so far,

Jonas Stein <news at jonasstein.de>