Hi Aaron,
You should be able to put some script in the 'full' event of the field to set ficus to the next field ... something like;
form1.#subform[0].TextField1::full - (JavaScript, client)
xfa.host.setFocus('TextField2');
depending on your tabbing you might also be able to have;
xfa.host.setFocus(this.resolveNode('#traversal.#traverse').ref);
Bruce