thanks for that BBW ... unfortunately that link is for ebay australia ... I was hoping I might get some responses from the UK
I bought one off ebay too, it was a cheap-ish one with a time laps and timer functionality.
Timer Remote Shutter Release OLYMPUS E-450 E-510 RM-UC1 on eBay.ca (item 140405441001 end time 05-Jun-10 01:51:07 EDT)
It 90% worked. It only malfunctioned when I had continuous shooting on or when it was unable to obtain focus in auto focus mode.
I ended up fixing it though by taking it apart and unsoldering one wire and resoldering it in another place... it works fine now - except I don't get half-press but at least it doesn't freeze/lock the camera or shoot continuously until I unplug it