My research on modern ideas on Lamarckism has led me to Edward Steele, a controversial Australian Molecular immunologist. He has (indirectly) demonstrated a counterexample contradicting the Weismann Barrier. Now my instinct (as was his) was to suggest that the Weismann Barrier is therefore disproven, and we should be looking more closely as to when, why (or why not) there would be information feedback from somatic cells to germline cells.
I would also suggest that the Central Dogma of molecular biology should not be taken as gospel in evolution. It is not a proven fact as such - it is a simplification that demonstrates the orderly passage of genetic replicative information. It says nothing at all about the exceptions to this process (mutations). However, it is the very exceptions to the process which drives evolutionary progress. Natural selection is the big feedback loop for information about the environment to (indirectly) affect DNA. I am certain that there is extensive natural selection between sperm - However, this isn't exactly comparing one's fitness with others, because they are all from the one organism. An elaborate error correction mechanism (to obtain the best possible duplication of genes) is not actually selecting at all. It must be practically a simulation of how fit they will be in the environment - letting through genes and mutations that "pass the test" which must be indicative enough of adequate fitness through a living body.