I don't think there are any.

For such laptops to exist, there should exist a memory controller that supports ECC RAM. Intel's chips have memory controller built-in, since Nehalem (2008) [1] and Intel has no mobile CPUs with ECC support. Apart from the brand-new mobile Xeon's, the first of which are released in September and have 45W TDP; [2][3] I think the laptops with them are not out yet.

[1] https://en.wikipedia.org/wiki/Nehalem_%28microarchitecture%2...

[2] http://ark.intel.com/products/family/88210/Intel-Xeon-Proces...

[3] https://en.wikipedia.org/wiki/List_of_Intel_Xeon_microproces...