The "tape" parts you list don't have a date for end of support and are eligible for premier support.
LTO4-IB4FC-SL500Z : not EOLed. LTO6 drives are coming and this drive will be certainly be EOLed beginning of CY2013
StorageTek SL500 : the SL500 tape library has been EOLed. The last order date is February 28, 2012. SL150 tape library is replacing the SL500. The upgrades for existing SL500 are not EOLed.
StorageTek XSL500-LCARTEX-Z : not EOLed.