There's new life for two members of Digable Planets, the hip-hop trio that hit big in the early '90s with the jazz-influenced track, "Rebirth of Slick (Cool Like Dat)," from its 1993 debut album, "Reachin' (A New Refutation of Time and Space)."Despite the crossover success, Digable Planets disbanded a little over a year later, following the release of its second album, 1994's "Blowout Comb." Ladybug, the female MC of the group who now records under the nom-de-plume Lady Mecca, is presently in the studio working on a solo album she hopes to put out in the summer of 1999. Another one of the Planets, rapper Butterfly, is also preparing to make his solo debut, and plans to release his own new record, tentatively titled "Since 1999," sometime next spring. No word yet on what the final member of the trio, Doodlebug, is working on, but we'll keep you posted.