The processor and wireless communication layer alone acts the basestation in the SPOT kit, the basestation connects to your development machine and allows you to write programs that can run on your PC and use the basestation's radio to communicate with remote Sun SPOTs. The development tools also make use of the basestation to deploy and debug applications on remote Sun SPOTs. Note that a full Sun SPOT can also be used as a basestation, though in doing so its sensor board would not be used.
Sun SPOT is also has a wide range of development platforms, the initial Sun SPOT development software has been tested on Windows XP, Macintosh OS X 10.4 running on both PowerPC and Intel-based hosts, Linux (Fedora Core 5, SuSE 10.1 and Ubuntu 6.06), and Solaris x86 (August release or later with latest USB drivers and running Java 5 not 6). Unforunately, nowadays Sun SPOT cannot support the M$ Windows Vista very well.
May I use more sensors in Sun SOPT? Of course, you can attach many external sensors by variety of inputs, such as GPS, humidity, etc.
During our China Education & Research Conference, many teachers and students show their great interesting in the Sun SPOT. They around this booth and ask us lots of questions, such as "is this open source?", "when and where we can buy it?", "how many developers in the Sun SPOT communities?" and so on.
From this, we may get one result: Sun SPOT surprised the world.
At last, there are significant educational discounts available for the Sun SPOT kits, it is about $299 per kit. You can contact a Sun sales for more details. Sun SPOT in the second half of this year can be sold in P.R.C.