Definitely need Boiler Connect
I agree with the last poster. I don't really see much value in the whole idea of programmable zones without the boiler interlock - you should definitely stock that if you can.
With it you can do away with a central timer/thermostat altogether, without it you have a hobbled system where the zones may want to operate when the central timer or thermostat are not calling (and hence the boiler isn't running). It also has the added benefit of allowing monitoring of when there is a heating call anywhere in the house (or at least, the FHT zones of the house) by broadcasting an FS20 on or off signal which can be monitored by a PC or other FS20 receiver.
FHEM running on a SLUG (LinkSys NSLU2)
I wasn't happy with needing to have a PC on all the time in order to run the FHZ 1300 PC interface along with FHEM and my xAP FHEM gateway so I managed to get it working on a SLUG (LinkSys NSLU2) running SLUGOS 5.3
There were some basic instructions on the FHEM web site but they were for an older version of FHEM and were based on Debian Linux (I prefer SLUGOS).
The result is a low power (around 10watts) 24/7 heating controller offering the FHEM web interface and xAP gateway.
If anybody is interested I can pull together my scribbled notes and post them?
Martyn