At present, my job takes up a tremendous amount of my time - I typically put about 65 hours in a week.
So, I don't get a tremendous amount of free time. What free time I DO have, I prefer to use for myself. So, until my job stops taking up so much of my time (which, hopefully, will be soon anyways), I don't expect to be updating any of my texture packs.
HOWEVER, after Minecraft 1.0 releases, I do expect to at least begin work updating all my packs, because these texture packs SHOULD be permanently usable. After 1.0, I expect any new content releases will work like expansions and the new textures will use a separate folder, allowing Minecraft to merely load the separate textures for anything my texture packs are missing. This will make it very texture-pack-author-friendly, and make it really easy for us to stay up-to-date. So I plan to get all three of mine (two available on here and one not yet) updated and ready to go at that time. Stay tuned!