Navy Federal Credit Union recently advertised 100% up to 800K. Usually means that there are are other credit unions offering similiar products.
100% Financing—HomeBuyers Choice
Ideal for the first-time homebuyer:
* 15-, 30-, or 40-year fixed rates
* No down payment required
* No PMI required
* Seller concessions up to 4% allowed
* Maximum loan-to-value of 101.50%
(includes a HomeBuyers Choice Funding Fee, which can be financed into the loan amount)
* Available for loans up to $850,000