Alternative to BGP-4 for multihoming?

[Hank Nussbacher <hank () att net il>]

Radware has a product called Linkproof and claims that it negates the need
for BGP-4 and portable IP addresses:

http://www.radware.com/product/lproof/Default.htm

I have a customer that requires multihoming and they want to use Linkproof
and I want them to do BGP-4.  Does anyone have any experience using this as
an alternative to BGP-4?

Thanks,
Hank