JDK 1.5 will reach its "End Of Service Life" in October, 2009. JDK 1.5 will be no more officially supported after this period. You can buy, however, commercial support even for the next 15 years - if you cannot migrate to JDK 1.6.
...there is no need to worry - in case you are still running on JDK 1.4 :-).
NEW 2016: Java EE 7 Workshops: Bootstrap, Effective, Architectures, April, 4th-6th, Munich's Airport
On demand workshops: Java EE 7 Bootstrap, Effective Java EE 7 and NEW: Java EE 7 Testing are available for streaming