What ever happened to O-Town?

Hard as it may be to believe, it's been over 15 years since O-Town's infectiously catchy (and pretty inappropriate) song "Liquid Dreams" ruled MTV's TRL, and "All Or Nothing" became the most requested song at homecoming dances across the country.
The boy band's breakup in 2003 marked an end of an era in pop music, forcing members Ashley Parker Angel, Erik-Michael Estrada, Dan Miller, Trevor Penick and Jacob Underwood to fend for themselves in and out of the spotlight. With recent news of a reunion (sans Angel) and an upcoming album, it's worth exploring the question that so often crosses the minds of late-20s and early-30s pop music fans everywhere: whatever happened to O-Town?