Before I start googling again for hours, I put a bookmark here. BlogSnapshot seems to be a quite nice tool to upload pictures taken with your mobile phone to a simplephpblog installation. Unfortunately it's not working with my V3 Razr since Motorola seems to have cropped the Java engine. But I will try it with my new phone (will be a Nokia 6233).
P.S: If anyone is interested in buying a used Motorola V3 Razr (very good condition!), drop me a line. Otherwise I gonna offer it in Ebay.