Java is a programming language. Hardware support for it is not necessary. Any web site that uses Java for some required function (e.g. account login on some banking sites) will not work with the Maemo browser. Java programs, common on many other phones, will not install or run in Maemo. Nokia has stated they are not working on making Java available on Maemo. It is possible that someone else may craft a solution to running Java programs, a Java plug-in for the Maemo browser, or the like on Maemo, but such tasks are not simple, weekend projects. In previous Maemo releases, it has been possible to s-l-o-w-l-y run at least some Java applications and applets within Easy Debian. That option should be available once again in Maemo 5, though qole has to fight past a few additional barriers this time. As I understand it, the N900 has an IR transmitter only.