TF Tuned just took their first shipment of BOS Engineering cartridge upgrades for RockShox Boxxer, Marzocchi 888 and Fox 40 forks.
There's loads of info on the forks and what TF can do for you here. If that aint enough, million times World Cup winner Nico V. is riding BOS for '08 which is never a bad sign!
More stuff, including a new rear shock, will follow later this year.