I emailed Chapura to ask about future updates of PocketMirror for WebOS and specifically if categories would be added to a Contacts app. Categories is an essential business productivity feature. Here Chapura's reply:

I have forwarded your suggestion to our development team. At this time there is not a way to sync categories with the WebOS Contacts and with the fact that contacts has to tie in with e-mail and the phone functions writing our own app would be difficult-and probably not possible.