I haven't seen this mentioned anywhere, so I'll mention it.
Domino 8.5 seems to automatically wrap checkboxes and radio buttons with labels without having to modify any settings.
Pre 8.5 radio button:
<input name="some-radio" type="radio" value="some value">
8.5 radio button
<label><input name="some-radio" type="radio" value="some value"></label>
In IE6, this doesn't make much difference, but in IE7 and beyond, and most other browsers, this lets the user click the label (the text), and the radiobutton/checkbox is selected. More about labels and accessibility here.