First post here, eh?
No offence, but this site sounds a little fishy.
You record all your most prized possessions, give a little personal information, just in case something gets stolen in the future?
Sounds like a good way to set people up to steal their goods. Makes the thieves jobs a little easier when the victim thinks he/she can trust the ones robbing them.
Just something to think about before anyone jumps in head first and gives out any info to this site.
You can usually register any product with the manufacturer, and that's enough proof that it's yours.