This paper demonstrates targeted insertion by non-homologous-end-joining - and thus, not by homologous recombination - in fish embryos, and with germline transmission. It's still unclear to me how efficient this will be to generate germline transmission in mice, but this is a promising step.
Genome Res. 2014 Jan;24(1):142-53. doi: 10.1101/gr.161638.113. Epub 2013 Oct 31.
Highly efficient CRISPR/Cas9-mediated knock-in in zebrafish by homology-independent DNA repair.
TO, Duroure K, De Cian A, JP, Del Bene F.