i´d have an idea for remote wipe over internet without using own server...
one could just set up a twitter account extra for this feature and enter the url and login information in the preferences of autowipe which on bootup checks the twitter account for a special command message.
when your phone gets stolen its most likely the theif will replace your sim before you eaven realize it was stolen, this way only thing needed is the correct apn settings for the new simcard and your phone gets wiped when its booted. it could also send a message to twitter containing the new phone number and maybe also frequent location info.
the name of the software should be obscureable so the theif eaven wont know its there. autowipe should not perform a full wipe (like from recovery, but just delete userdata of all apps except autowipe.
this way the theif will not realize the phone was wiped and tracked and would use it like it is. so you have best chance to get your phone back. my last phone got stolen out of my car when i forgot it there, i had wavesecure installed on it and set it to lock the phone on sim change. WS sent an sms to my buddy containing the phone number and the phone was locked. the lock message alarmed the theif and the phone was turned off instantly. the sim card was actually some prepay card and so not possible to get info about, also both, phone and sim, were never used again after that. bad luck for me, but hopefully i have learned something everybody can use...
edit: it is obvious wipe via sms will not be of any use when the phone was stolen... also you should warn users about locking feature to be for testing only.