Ok read about this a bit recently as a mate has had trouble with his bb30 boardman.
We personally hate bb30 and think if the manufacturers cant get the tolerances right they should leave it alone.
We looked at the fsa sleeve and its a 'one time use' type thing as in you can only install it once and remove it once ideally.
There is a mfg manufacturing cup adapters but we thought that these wont solve the problem because they still run on the bb30 bearinsg and whatnot.
His bike was given to him to use for the http://www.dallaglioflintoff2012.com/
We were just waiting fro the problems to happen as we have seen this at least 10 times in the past few months.
Took 2 days for the creaks to kick in.
As its for the slam he isnt allowed to modify it so its the same as the others that will be used.
The best thing we found was http://www.ebay.co.uk/itm/KCNC-BB30-Adaptor-XC-FR-Bottom-Bracket-68-73mm-Gold-rrp-29-99-/220983853357#vi-content
Which should allow the use of hollotech cranks (24mm axle i think).
So he would have had to use his own crank set. But better than dreaded bb30.