-``pypy-stm`` is a variant of the regular PyPy interpreter. With caveats_
+``pypy-stm`` is a variant of the regular PyPy interpreter. (This
+version supports Python 2.7; see below for `Python 3`_.) With caveats_
listed below, it should be in theory within 20%-50% slower than a
regular PyPy, comparing the JIT version in both cases (but see below!).
+In this document I describe "pypy-stm", which is based on PyPy's Python
+2.7 interpreter. Supporting Python 3 should take about half an
+afternoon of work. Obviously, what I *don't* mean is that by tomorrow
+you can have a finished and polished "pypy3-stm" product. General py3k
+work is still missing; and general stm work is also still missing. But
+they are rather independent from each other, as usual in PyPy. The
+required afternoon of work will certainly be done one of these days now
+that the internal interfaces seem to stabilize.
+The same is true for other languages implemented in the RPython
+framework, although the amount of work to put there might vary, because
+the STM framework within RPython is currently targeting the PyPy
+interpreter and other ones might have slightly different needs.