The JIMO orbiter(i.e including 4 moons of jupiter besides europa) is planned to launch not before 2011
it's a subproject of project prometheus that introduces spacecrafts working on nucleur energy, this paves the way for a heavy loaded science equip board way beyond the boards we used to deal with on galeleo, cassini, even those on the recently launched triplet twoards MARS.
so the orbiter will be much more efficient(EUROPA deserves that) and with a faster pace on its way there.
Astrobiologists demanded a lander embedded with the orbiter, but the roof of expenses(and politics) didn't allow that to be considered. the orbiter will map the surface using advanced radars, and will analyse the very thin atmosphere..well that's as far as biology is concerned, besides learning about the magnetic sphere, and the magnetic interaction b/w jupiter and europa(tidal waves...).
u can watch a video of the orbiter at JIMO Orbiter Video.

EUROPA is an enticing target for astrobiologists and is a prime candidate for hosting bacterial life beneath a speculated ocean at the level of (also anticipated) water vents at the buttom.
hope this does the trick brothers!
mostwanted.