No specific license or endorsement.. but high performance, tailwheel and possibly a complex endorsement can come in handy.

that said, it'd be fairly reckless to teach yourself aerobatics.

Jeremy

more info from the FAA:http://www.airweb.faa.gov/Regulatory...hlight=91%2048

REFERENCES. In addition to the sections of the FAR quoted above,
there are other sections of which a pilot should be knowledgeable:
a. Section 91.9 - Careless or Reckless Operation. “No person may
operate an aircraft in a careless or reckless manner so as to endanger the
li.fe or property of another .”
b 0 . Section 91.15 - Parachutes and Parachuting Pilots should
familiarize themselves with the requirements of Section 91.15 which contain
certain parachute wearing and packing requirements.
c. Section 91.71 - Acrobatic Flight. “No person may operate an
aircraft in acrobatic flight:
(a) Over any congested area of a city, town or settlement;
(b) Over an open air assembly of persons;
(c) Within a control zone or Federal airway;
(d) Below an altitude of 1,500 feet above the surface; or
(e) When flight visibility is less than three miles