I just uploaded AutoDia version 2.00 to CPAN. It went up on the site last night, and nobody mailed me to say it was horribly broken.
It now does a load of stuff that it didn't used to - check the CHANGES file. All the major language parsers have been improved but I'm afraid the promised major reworking of the layout in dia hasn't made it in. The new auto-layout and plotting will have to wait until I get SpringGraph working well enough to support the demands autodia makes of it, then I can replace the current layout logic with a version based on what SpringGraph is now doing.
I also just uploaded a new version of SpringGraph which fixes an error in one of the example files.