For the last week or two I've been cleaning up PackBSP's documentation and build process to get it ready for open-source hosting on GitHub. With everything important out in the open (including the jhllib and hl2parse libraries) I hope to avoid the type of abandonment that befell Pakrat. With luck, I'll finally cut the ribbon sometime this week and simultaneously release version 2.0.5.
Version 2.0.5 is primarily bug-fixes, particularly to solve an issue where PackBSP won't start up correctly on certain Windows installations.
If anybody already has a GitHub account, feel free to add or vote on the Issues Page in terms of what needs to be done next, but I'm currently thinking of support for parsing PCF files (custom particles) to determine what sprites or materials they depend-upon.