Welcome to FT.
Chase no longer allows you to earn bonus miles if you apply again for the SAME card (I will assume you have Visa Signature).
However, if you have not done so already, you can get the BUSINESS version of the card. Just apply, for example, as "Paulshu Consulting". You dont need a TAX ID number for the business - as a sole proprietor, your SS# is all that is needed.
Here's a link for 25,000 bonus miles - requires $250 spend
http://www.firstusa.com/cgi-bin/webc...cont&mkid=6VMT
Good luck