I have some free ¡ê30 google Adwords voucher.But it is useful only for new adwords account,what can I do with these vouchers?

hahamy, I think I'd suggest 'honoring' the original intent of these vouchers - and simply give them to colleagues or contacts who are interested in starting a new AdWords account, and who would like to try it out on Google's nickel for a short time. ;)

AWR