VMware just uploaded a whole bunch of patches for ESX 3.5:
ESX350-200802301-BG : Update to the bnx2 Driver
ESX350-200802303-SG : Security Update to the util-linux Package
ESX350-200802304-SG : Security Update to the Perl Package
ESX350-200802305-SG : Security Update to the openssl Package
ESX350-200802306-BG : VMware ESX Server 3.5, Patch ESX350-200802306-BG: Daylight Saving Time Update
ESX350-200802401-BG : Updates to vmware-hostd
ESX350-200802403-BG : Improved Statistics Collection for Support Scripts, Fix for Patch Issue Seen After Upgrading from ESX Server 2.5.x to 3.5.0
ESX350-200802404-BG : Resolves DMA Issues on LSI 1078 and 106XE HBAs
ESX350-200802405-BG : Update to MegaRAID SCSI Driver to Fix Dell PowerEdge 6650 Boot Issue
ESX350-200802406-SG : Updated aacraid Driver
ESX350-200802408-SG : Security Updates to the Python Package
ESX350-200802409-BG : Fix for Reset Issue with CD-ROM Controller
ESX350-200802410-BG : Unexpected Reboot of Virtual Machines Configured to Automatically Start or Stop
ESX350-200802411-BG : Enhanced Validation Checks, and Fixes for Storage VMotion and Lab Manager
ESX350-200802412-BG : Updates to the VMkernel to Fix Networking and Hardware Issues
ESX350-200802413-BG : Sunfire X4200 Host Hangs Because of HBA Timeouts Due to DMA Problems
ESX350-200802414-BG : Discrete Sensors Report Wrong Information to Monitors
ESX350-200802415-SG : Security Update to Samba Packages
And there’s also an update for 3i available:
ESXe350-200802401-I-BG : Update to the bnx2 Driver
Good luck with patching those hosts, I will be testing these patches later this day so if I encounter any problems you will be the first to know