I guess maybe I should start reading BlackBerry Connection Newsletter because Ronen at BerryReview spotted a paragraph in a recent article about the new Gmail plugin that confirms RIM is working on two way sync for Gmail.
"Initially, synchronization with the Gmail webmail client is only in the smartphone-to-webmail direction, meaning that changes made to messages (such as adding or editing a label) using the web client will not be reflected on the handheld, but two-way synchronization is expected to be implemented in the near future."
Sounds like we can expect two way sync with Gmail in the near future. I for one am excited and hope the near future is very soon. This is just another one of those features RIM is lacking in my opinion. Having your email and labels sync one way is only taking care of half the job.