Susan,

With FCMP, you can package up your own AGE function:

proc fcmp outlib=work.myfuncs.dates;
function age(d);
return(yrdif(d,today(),'AGE'));
endsub;
run; quit;

/** to use it **/
options cmplib=work.myfuncs;
data _null_;
x = age('29SEP2007'd);
put x=;
run;