Here is a collection of storage Best Practices from different vendors on VMware vSphere.
HP
HP Enterprise Virtual Array (EVA) family with VMware vSphere 4.0, 4.1 and 5.0 Configuration Best practices
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Running VMware vSphere 4 on HP LeftHand P4000 SAN Solutions
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Best Practices for deploying VMware and vSphere 4 with VMware High Availability and Fault Tolerance on HP P4500 Multi-Site SAN cluster
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HP P4000 LeftHand Solutions with VMware vSphere Best Practices (incl. vSphere 5)
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3PAR Utility Storage with VMware vSphere
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HP P2000 Software Plug-in for VMware VAAI
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HP 3PAR Storage and VMware vSphere 5 best practices
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NetApp
NetApp Storage Best Practices for VMware vSphere TR-3749
Version 3.0, last updated: December 2011
NetApp Deploying VMware vCenter Site Recovery Manager 5 with NetApp FAS/V-Series Storage Systems
Version May 2012
EMC
Using EMC VNX Storage with VMware vSphere
Version 1.0
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EMC Powerpath/VE for VMware vSphere Best Practices planning
Dell
Configuring iSCSI Connectivity with VMware vSphere 5 and Dell EqualLogic PS Series Storage TR1075
V1.0 November 2011
Disaster Recovery with Dell EqualLogic PS Series SAN and VMware vSphere Site Recovery Manager 5 TR1073
V1.0 September 2011
Sizing and Best Practices for Deploying VMware View 4.5 on VMware vSphere 4.1 with Dell EqualLogic Storage
Dell EqualLogic iSCSI Volume Connection Count Maximum Characterization
Hitachi
Optimizing the Hitachi Virtual Storage Platform in vSphere Environments
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IBM
IBM Storage N series and VMware vSphere Storage Best Practices
IBM StorWize V7000 Unified: A feature-rich environment for VMware vSphere 5.0
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Updated:
27-08-2012 Added HP 3PAR Storage and VMware vSphere 5 best practices
16-05-2012 Added NetApp Deploying VMware vCenter Site Recovery Manager 5 with NetApp FAS/V-Series Storage Systems
22-02-2012 HP P2000 Software Plug-in for VMware VAAI
21-11-2011 Add Configuring iSCSI Connectivity with VMware vSphere 5 and Dell EqualLogic PS Series Storage