i have alot of players in this range, who i have paid for numerous flying levels, i know the quick answer from many will be to level up to 30+ and get it back.
i find this unacceptable, i also take nothing for granted when it comes to blizzard, in that i may lose it, at 30 have to buy the training again, becuase they did not think of this and will be oh well blown off because they will have to balance systems in SL for 2 years