Ross and Alejandro will be providing an overview of strains offered by Omega Yeast Labs, now carried by NB.
Alejandro will have a couple beers made using yeasts currently available only from OYL.
Take a look at the attached spreadsheet comparing the strains from the OYL, White Labs, and Wyeast catalogs. Though there is likely some variation between manufacturers, in many instances the comparable strains will be pretty similar if you need to make a substitution because your go-to yeast is not available.