[math-fun] Taylor series "inverter"?

Is there a machine out there, analogous to Plouffe's Inverter ( http://pi.lacim.uqam.ca/eng/ ), or the sequences database ( http://www.research.att.com/~njas/sequences/ ), that can take the first n coefficients of a Taylor series and find a function close to that Taylor series? Better yet (of course) take *any* expression for a function and return the simplest expression of the function based on well- known functions. --Steve p.s. I am behind in my egg-collecting.