Biotek is a huge automated version of the Microprobe, and now sold
by Ventana.  Fisher is also touting the capillary gap system as a way
to perform routine and special stains in addition to immunohistochemistry
which is how our labs utilizes it.  It is very cost effective in terms of 
reagents, slides are a bit more expensive, but wonderful for doing larger
volumes of slides (20 per holder) with options to stain more than one
antibody at a time.  It takes some practice to use it, but as in all things,
easy to learn and work with.  It certainly is a nice inexpensive semiautomated
way to do large numbers of immunostains, and compatible with kit use. 
Zymed has reagents designed for use with capillary systems, CapGap??, hope
I got that right?  

It works well, and there is a wonderful article in Journal of Histotechnology
by John Frank et al on Cost and time saving immunohistochemical method
for co-localization of prolactin with growth hormone or adrenocorticotropic
hormone in rat pituitary, Dec 1997 20:313-319.

John works with this system about as well as anyone I know.  I know it can
be used for apoptosis TUNEL methods (Trevingen).  I thought John's setup was
exceptional for ease of handling slides, etc and his method has become the
gold standard for our setup.  

Gayle Callis