I just published this quick start on using happs-hsp-template:
if you don't like to read and just want to see the code do:
darcs get http://src.seereason.com/examples/happs-hsp-quickstart/
to extract the example code into the template sub directory. That
should give you a working, cabalized starting point.
Also, this tutorial requires some patches to HAppS, HSP, and happs-
template which have not hit the mainlines yet, so you will need to
edit the code a bit to get started.
I believe you should just need to remove the 'Nothing' after
execTemplate, and remove the validateConf line.