Kudos to Rob Kashow at Tolle Lege! (I found it through John Anderson at hesed we’emet) for finding this! It is a full version of the old International Critical Commentary series online. They are publishing new commentaries and the old ones are out of copyright. The uptake for you is that the older ones are all online for free in pdf format. Obviously some of the information in these texts will be outdated, but there is still an abundance of good material in them. This link will definitely be making its way onto my website and to my e-mail list (be sure to join so you can keep up to date on things like this). Thanks again John.
Update – Here’s a link to the Exodus volume.