[Vigilanteman]

Michigan's delegate allocation process is described here: two for the statewide winner, two for the winner of each of the state's 14 congressional districts.

Accordingly, a 15-15 split is not possible. Santorum could actually pocket 16 or 18 delegates since he won 64% of Michigan's counties. It would depend on the geography of the congressional districts.

[JerseyHighlander]

According to your link, and using the prelim results, Santorum won 7 CDs, Romney 7 CDs, Santorum wins 14 EVs, and Romney wins 16 EVs.

Apparently Romney plays well with apolitical morons in the suburbs. It’s the only reason he keeps winning close primaries.

[kidd]

According to the link in post #3,
they split the congressional districts 7-7 (that’s 14 delegates for each candidate)

and because the popular vote was so close, the two statewide delegates were going to be split (one for each)

15-15

[CharlesWayneCT]

If nobody wins 50%, the 2 statewide delegates are split proportionately, so they each get 1 delegate.