Been waiting for Python support since I first heard of the project! Getting an error trying to connect to Python 3 process, works with Python 2.7 though. According to OP's post Python 3 should be compatible, but I get this error:

Looks like there was an issue trying to connect to the project. Here's what we got:

    Traceback (most recent call last):
  File "C:\Users\way\.lighttable\plugins\python\ltmain.py", line 12, in <module>
    import ltipy
  File "C:\Users\way\.lighttable\plugins\python\ltipy.py", line 181
    print "no proc"
                  ^

SyntaxError: invalid syntax

which looks like a typical error when running 2.7 code on 3+. Anyone else suffering from the same issue or is something messed up on my end? Running Windows 64-bit, Python 3.3, IPython 0.13.