It's official, there's going to be one more mission to service Hubble in 2008!
As I described in more detail elsewhere, there's a few things that I feel are crucial to a useful mission:
- Boost the telescope's orbit
- Replace the dying batteries
- Replace the dying gyroscopes
Things like upgrading cameras are a bonus. Also, keep in mind that this mission does NOT solve the issue of what to do when it "dies" - re-enters the atmosphere. Parts of the main mirror will probably survive re-entry (that is, not burn up), and it's been estimated that there's up to a 1 in 700 chance of human fatality from an uncontrolled descent. NASA still has not addressed that concern.