Whats the recent status of TiKz support in ConTeXt MkIV? I'm asking because
in pgfmanual 2.10 on page 25 it says: 


  Note that pgf/TikZ is not supported by recent ConTEXt versions (like mark IV, the LuaTEX-aware part of ConTEXt).


I tried the following example but it doesn't work as expected.

\setupcolors[state=start]
\usemodule[tikz]   

\starttext

\starttikzpicture
 [node distance=4cm,
    place/.style={circle,draw=blue!50,fill=blue!20,thick,
                 inner sep=0pt,minimum size=6mm}]

    \node[place] (wat) {};
  \node[place] (wag) [below=of wat] {};

\stoptikzpicture

\stoptext


No matter how big the node distance=4cm is, the circles are overlapping with an offset of approximately  0.5cm. 

ConTeXt version: mtx-context     | current version: 2012.05.22 16:12 


Question: ros send message on startup doesn't seem to work
Answer: This thread might also be helpful:
http://answers.ros.org/question/9665/test-for-when-a-rospy-publisher-become-available/

The question is specifically about python, but i think the root cause is ROS specific, not language specific.