HP proposes since May 1999 a worldwide support offer on Linux. This offer includes up to the possibility to answer 24x7, in a delay of 2 hours after taking the call. The reference of this product is : HP LNXIA32A
HP proposes since 2001 a "Mission Critical support" contract for his Linux customers.
HP has also online ressources to help people using Linux with its products :
Third party firms also propose Linux and free software support on HP platforms :