Actually, not to discourage you from using PA as I'm a big fan myself and thing Bruce is a great developer, on the smartphone I found less of a need for it (plus it's still a little buggy being in it's early stages).
You can get a free program called
Don't Forget which basically reminds you of missed SMS, email, VM, etc and is configurable for amount of repeats. It can even be disabled for the Silent profile.
It is not as fancy nor as configurable as phone alarm but for basic repeating of alarms it's great.
Combine that with
Profile Switcher ($4.95) and a Homescreen with the counters and you have about 80% of PhoneAlarm.