After Verizon's ambiguousness ended up hitting it right where it hurts (read: the wallet), the carrier cleaned up its act a bit and redefined "unlimited" in a hot-off-the-press version of its Terms & Conditions. While perusing through the legalese, you'll notice that checking out "continuous web camera posts or broadcasts / automatic data feeds (RSS)" are strictly prohibited, right along with P2P sharing or using your BroadbandAccess as a "substitute or backup for private lines or dedicated data connections." Moving on, you'll also see that exceeding 5GB of usage during any single billing period gives Verizon the right to "reduce throughput speeds of any application that would otherwise exceed such speed to a maximum of approximately 200Kbps." It gets worse -- these speeds are (unsurprisingly) "subject to change," so it sounds like your connection can be throttled right on down to a crawl should you pass the 5GB barrier. Have fun!*
*...just keep it under 5GB if you know what's good for you.