Excelsior has released JET 6.0, a Java virtual machine for Linux and Windows that uses a combination of a traditional native code compiler and just-in-time compilation from byte code. According to Dmitry Leskov, "The main reason to upgrade is Java SE 6 support." JET costs start at $1200 and run up to $4500 depending on which version and how much support you want. Support is available by e-mail and Web site only.