ConTeXt and slides

[Thomas A.Schmitz <thomas.schmitz@uni-bonn.de>]

Hi gang,

I'm trying to figure out whether it's whorthwhile to write slides for 
my presentations in ConTeXt instead of using Powerpoint or Keynote (I'm 
not an engineer or a scientist, so maths doesn't matter). I have cooked 
up a nice-looking template without too many frills that kind of copies 
what I used to do in Keynote (shaded background, footers etc.). There's 
one important thing I can't get to work: is it possible to have a 
picture and a text next to it with the text being centered horizontally 
and vertically like so?

picturepicturepicture
picturepicturepicture
picturepicturepicture           Here
picturepicturepicture        goes all the
picturepicturepicture           text
picturepicturepicture
picturepicturepicture

What I tried is this:

\startfiguretext[left]{none}{\externalfigure[picture]}
\vfill
\midaligned{Here}
\midaligned{goes all the}
\midaligned{text}
\vfill
\stopfiguretext

but that doesn't work. I also tried things like \framed and 
\startcombinations (calling the text from a buffer), but all in vain. 
There doesn't seem to be an easy mechanism for centering stuff 
vertically in ConTeXt? Any help would be appreciated!

Best

Thomas