i havent had much time lately, though this does give me a chance to ask ppl about using those pens that draw straight into the 3d program.
does anyone use one of these, are they worth having ?
I don't use one, but mostly because a good one is just too pricey for me ATM

Are they worth having? Depends on what your modeling and how you work, if you were working in organic models, or decorative patterns then sure I can see a big use for a pen. And if you have one you can do a scetch and keep refining it until your ready to use that as a pattern template for building into a 3D model which I can see is very useful.
People modeling mechanical objects tend to use the mouse rather than the pen, from what I've read.
The Organics course for the free Truespace program has a guy that uses a pen and tablet almost exclusively, in one of the first videos he talks about the tablet setup etc. you might find it interesting for that and for the modeling in general
http://www.caligari.com/products/trueSpace/ts5/Courses/WorkspaceOrganicModeling1.asp?Cate=Training&Subcate=FundamentalIt was the first 3D modeling tutorial I did

There's a few free 3D programs out there, Truespace is a great starting point for a beginner as it's got a wealth of video tutorials and a very easy icon driven interface (unlike Blender which is very daunting for a beginner, but also has a wealth of tutorials).