In addition to the 30% bonus they’re offering on transfered Membership Rewards points at the moment, British Airways is also offering a 25% bonus on the transfer of hotel points through January, 13, 2013. Bonus points should post 4-6 weeks after the transfer is complete.
In general I don’t consider Avios to be an especially valuable points currency, though for certain redemptions (like shorthaul coach awards) they can really come in handy, so I’m sure this will interest some.
If you transfered 20,000 Starpoints during this promotion you’d receive a total of 31,250 Avios. That’s because you get a 5,000 point bonus for every 20,000 Starpoints you convert, and then the 25% transfer bonus on top of that.
Marriott has vacation packages whereby you get a set number of points and free nights, and British Airways is one of the partners included in that, so it may be worth checking out that option.
Club Carlson points can most efficiently be transfered to British Airways at a 100,000:18,000 ratio, so through this promotion you’d earn a total of 22,500 Avios for such a transfer.
It’s generally a horrible value to convert Hilton, Hyatt, or Priority Club points into airline miles, so I’d shy away from that.
This isn’t a promotion I’ll personally be taking advantage of, though it is nice to have the option.