There are two paths you could pursue.
1) Certified Services Partner. For this one, you would need to enroll in our certification course, next one occurring in July 2014. On certification you can then service Marketo accounts from a technical perspective. Will be with an extra cost
2) Referral Partner. No upfront cost but you must refer us 2 leads that we close before you can become a referral partner.
if you know the details, pls view Marketo website