Vibrate Then Ring?

Download or create a ringtone which would vibrate first, then ring.  

I have read people are having trouble finding these, however.

There is a free program called "Audacity" to import you ringtone (via USB cable).  I have used it to shorten ringtones so that they fit into the space allowed for the lg800g.

Simply insert blank space at the beginning of the ringtone before it starts.  The phone should go ahead and buzz, but will not ring until it gets to that marker. I would think 3-4 seconds would do the trick.

I've used Audacity quite a bit for different projects.  Just remember that Control Z is "undo" and you can try different things to get the results you want.  Then, export to save and transfer the file back to your phone by data cable.