Steve,

>Is there a preferred way inside the framework to display broken business rules in a web app?

There is...if you check out the Dev Guide section "Integrating Business Objects with a Web Form", it shows that you can call the web form's Save() method like this:

private void btnSave_Click(object sender, System.EventArgs e)
{
	//  Retrieve the original DataSet from the Session variable
	DataSet dsOrder = (DataSet)Session["dsOrder"];

	// Call the Web Form's Save method, passing the business object and the original data.
	// The business object raises a Saving event and all bound Web controls
	// bind their data back into the DataSet
	if (this.Save(this.oOrder, dsOrder, this.oOrder.TableName) ==
		mmSaveDataResult.RulesPassed)
	{
		Response.Redirect("CustomerOrders.aspx");
	}
}

If there are any broken rules, these are automatically displayed for you. You can also call the mmBusinessWebPage's DisplayBrokenRules() method directly.

Regards,