We use a couple of similar products that are marketed to class 8 truck operators, Equal, and Balance Beads. The product is supposed to migrate to the light side of the tire/wheel assy and function as a real-time dynamic balance.
There are arguments as to it's effectiveness and service life, especially when things like un-dried air are introduced to it's environment(inside your tire). Equal is more like a weighted powder, and I've heard stories about clumping, and scrubbing of the inner liner of the tire. The Balance Beads are just that, a little beadier-looking. I've seen both products(both are small enough to introduce through the valvestem with the core removed) and the Equal is powdery, while the Beads are almost glass-like in appearance and texture.
There is another product that is essentially a tube that mounts over the studs, proximate to the bead of the wheel. Low-friction ceramic balls roll in an oilbath and again, they migrate to the light side of the installation to effect a rolling dynamic balance. This is marketed under the name "Centra-Matic Wheel Balancers" and has a better following than Equal or Balance Beads. I ran Centramatics a long time ago, and they actually overcame the nuisance of a slightly out-of-round tire, and I have run the other products(more aptly comparable to DynaBeads, I would think) and have remained undecided about my opinion of them. If they could manufacture an appearance-oriented version of the Centramatic for motorcycles, I'm sure it would be popular, but I'm just not into gadgets and gizmos.
I have to agree that the old lead weight concept remains effective and is more easily serviceable than something that goes INSIDE the tire. Yeah, you still have to remove the assy to balance/rebalance, but you don't have to break down your mount to get rid of it if you don't like it.
I have a particular affinity for the old static bubble-balancers, if you're lucky enough to know where one is...
Happy Motorin' -F-