Snapshot 4.1.1-20061017.225719-37 appears to have at least some of this code working now - it at least attempts to focus the first field.
which looks like this:
if (arguments.length < 1) return;
field = dojo.byId(field);
if (!field) return;
if (field.disabled || field.clientWidth < 1) return;
however, this Dojo function is only valid for elements with selectable text, which SELECT lists don't have. For these (and probably checkboxes, radio buttons, and maybe file upload form elements) you can only call their focus() functions.