Any Good Voronoi Code Out There?

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Help!

I've got a wacky idea I'd like to explore (pseudo-preliminary-pre-research stage) which will require some code, namely for Voronoi diagrams.  What I'd like seems like it should be available.  I think I want the following:

1)  I input a list of points -- 2-D is fine, but hey, if the code can handle 3-D, more time-wasting fun.
1a) Update: I suppose what I really want is for code that works on the "2-D torus" -- i.e say on the unit square [0,1]^2 where the boundaries wrap around, so that there's symmetry.  That would be ideal, but from what I understand "torus" versions of the algorithms are harder to find, so maybe I'll just have to deal with regular 2-D and truncate somehow.
2)  For the output, all I really want is the area of each cell corresponding to each point.  Sure, if more information is available -- things like number of sides of the cell, etc. -- again, more time-wasting fun for me.  But for now cell area seems most interesting.  (I don't need pretty pictures.) 
3)  Now, the painful part -- I expect to be doing a lot of incremental inserting and deleting of points.  So I'd like to have code that's very fast if say I delete a point from my list and insert a new point elsewhere.  The code I've seen available seems to (if I'm understanding right) just implement the algorithms where you have a list of points.  Some of them use incremental insertion and can therefore probably be modified easily to handle point insertions, but not point deletions.  Somehow I think dealing with point sets of thousands or more and re-computing from scratch when I delete a point seems like it will be way too slow for my explorations.  I realize handling deletions is harder, but that there exist algorithms for it, so I was surprised I can't easily find relevant code.  But maybe I'm just looking at the wrong place.


I suppose whatever language the code is I can figure out how to use/wrap/rewrite it to my needs, so I shouldn't quibble about those sorts of issues.

Strangely, I can't seem to find anything that meets these needs.  Feel free to set me straight via comments or mail.  Or, if it seems to be something I'll need to implement myself, feel free to point me to the most helpful relevant papers.