Apparently I have issues with my reading comprehension and with Textmate (initially) when it comes to using the sqldf package.
G. pointed out in the previous comments, I could have just used
options(gsubfn.engine = "R")
instead of going through the trouble of installing the tcltk binaries.
If you’ve got a happy distribution of R that comes with the working binaries, you can run sqldf and not have to worry about anything. Otherwise update the
gsubfn and use the options setting.
When in doubt, check and actually READ (whoops..) the FAQ: http://code.google.com/p/sqldf/