I'm not really sure how to
value Vanillacoin at the
moment.  If the insta send
method doesn't have any
security holes (if), then that
would provide some increased utility, but transactions still
need to be included in a block.
 So I guess you get faster
speeds only while the network
is low traffic and if applied to
Bitcoin, wouldn't give any gains if blocks are perma full
since you would want to wait
until the transaction is actually
inside a block?