Right now there is no "really good(TM)" solution if you use Debian testing / unstable.
- You can't use my packages anymore, they only work in stable aka Sarge.
- You can't install the official packages which are in unstable (not progressed to testing because of a FTBFS bug) because they need wx 2.4 which has recently been thrown out of Debian in favor of wx 2.6 which is yet only in experimental.
- You can use Vollstreckers CVS builds, but you should be aware that these are no stable releases and might work or not on a daily basis

The best solution (for a user of testing / unstable) would be to wait for the C++ ABI transition to complete, wx 2.6 enter unstable / testing and amule being built against wx 2.6. How long this will take? I have no idea...