Another contribution...
DEFCON - Circling Bombers
Not exactly the most useful of techniques but some may find use for this. Here's a rough guide on how to make bombers (and, well, figthers too) circle/orbit carriers and airfields. There is one snag with this technique and that is a current bug with bomber turning circles sometimes being tighter than normal (as seen in part 2 of the following videos).
If you do plan to use this technique, remember that the bombers will eventually run out of fuel so keep a eye on their fuel ranges.
In the following picture take note of how the bomber has been made to pass the airfield such that its wing tip touches the edge of the target circle. The time to give the order for the bomber to land (making it circle) is when the line from the bomber to the target pointed at by the cursor is pendicular to the direction the bomber is traveling i.e as shown in the image.
YouTube Links:
DEFCON - Circling Bombers (part 1) - Making a bomber circle an airfield
DEFCON - Circling Bombers (part 2) - Making multiple bombers circle an airfield and how it may go wrong.
DEFCON - Circling Bombers (part 3) - Making a bobmer circle a carrier.
Higher Quality Videos:
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DEFCON - Circling Bombers.rar
DEFCON - Circling Bombers (MIRROR)