We just got one of the new Blackberry 8530 EVDO touchpad devices from Bell Mobility, but returned the first one which we thought was defective.  When the second one went down at the same point in getting it set up (being added to our Blackberry Enterprise Server) this raised a flag.  It turns out the software currently posted on RIM's site has a bug which causes continuous reboots when policies such as memory cleaner are enabled.

A customised loader to enable the OS to be patched to the point where the device resuscitates is available, but you need to talk to Bell Data Support for it.  The loader was a bit finicky and threw errors a couple of times but eventually declared no patch required (i.e. the patch had taken) and the device rebooted.  Happy days.

UPDATE August 6th - the updated software (Package 5.0.0.1319, Applications 5.0.0.782, Platform 4.2.0.352) is available on blackberry.com for a conventional update, but I'm not sure you won't need to patch using the support tool if it's already in the reboot state.