well.... if you arent hearing any sound than you havent done any damage yet.

there are a few people who have completely removed their boots and just greased their joints on a regular basis (ask ascinder about this). he claims that he has been driving years with no boots on the CV's and he just greases em if he goes in water or a lot of dirt.

i would think with the minimal amount of leakage you have, that your ok for now. but im no mechanic so dont hold me to it!

maybe someone more technical will chime in