Upgrade to libdb5.x++ and cause new wallets to be incompatible with old bitcoin versions
Problem here is that we would then have to ship our own libdb5.x packages for maverick, and lucid, which really isnt any better than shipping db4.8 for oneiric.
include the libdb4.8++ packages and potentially cause collisions with other software making this same decision
My personal opinion is to go with this one. The likelyhood of causing any collisions or issues is fairly low as we can just re-upload the lucid db4.8 source and have launchpad build it for oneiric.
Upgrade to libdb5.x, cause new wallets to be incompatible with old bitcoin versions, but make an export option that will potentially be compatible "forever"
That would be a pain...plus we would want to switch mac/win32 releases to 5.X at the same time...