I'm not able to find a working example of what I need. They are either outdated and not compatible with 2012 Q3 or they don't apply.
I need the Telerik version of
Dim GuestCB As DataGridViewComboBoxCell
GuestCB = DataGridView1.Rows(DataGridView1.RowCount - 1).Cells("Guests")
For Each RV2 As DataRowView In DV2
Dim Row2 As DataRow = RV2.Row
DV2 is a filtered DataView that changes with each row, that's why I fill the ComboBox manually. This is just for display purposes - nothing is selected.