-- QN Team SmsSync update --
It looks like the capability to send SMS messages in the Ushahidi SmsSync plugin wasn't added until version 0.8, so those using SmsSync should make sure they have the plugin v0.8 or later, as well as the latest version of the SmsSync app.
I've had issues with the app failing to send even with v0.8 of the plugin and v1.0.5 of the app. I downloaded the v1.0.5 source from github and noticed that while the plugin checks for a "send" task, the SmsSync app was sending out "sendsms" task requests. However, as phishee is able to send SMS messages, I assume the v1.0.5 source differs from the v1.0.5 app on the android market in that it correctly sends using a "send" request. SmsSync v1.0.6 and the latest source in the repository also have this corrected.
I was able to get the SmsSync app to work with a Droid Incredible running android 2.2, sending at 5 minute intervals without a problem. However, when attempting to send SMS on a Nexus S (android 2.3.4), I noticed that the app would make the "send" request only when the "Enable Task Checking" checkbox was checked, and would fail to continue sending these requests at the specified interval.
I compiled a version of the SmsSync app using a different method of task scheduling described here. This has fixed the sending issue on the Nexus S. The previous method was to use a java timer and run scheduleAtFixedRate() to run the task, and I'm not quite sure why that wasn't working.