Massimiliano Daneri, of VMBK fame, did it again: this time released a very simple SSH console for the new VMware ESX Server 3.0, which is reachable by any browser.
vmSSHjwc (Virtual Machine SSH Java Web Console) is based on the popular AppGate MindTerm and has been modified to run on the ESX Server 3.0 console.
Download it at source for free.