Up until now, the Boost Mobile crowd's been missing out on those fancy visual voicemail creations, but that's about to change starting on May 31st. Earlier today, Smith Micro announced it's delivering its Visual Voicemail features to the prepaid-friendly carrier, with the upcoming Boost-branded HTC EVO Design 4G being the first slab to offer said tidbits. Smith Micro is also adding an optional service dubbed "Voicemail-to-Text," which -- for an extra $1.99 per month -- will essentially turn those vocal messa