I think, that one of the major priorities for Akelos should be shift from simpletest testing framework to PHPUnit in the next months. Testing with simpletest is horrible in my opinion. I do not mean the very process of testing , writing tests , assertions ... no ...
The thing which makes testing difficult with simpletest is its very dense output ... It is very difficult to read it, especially when you have already tested for a few hours ... I consider testing as an enjoyable thing , especially when I have test unit which produces claen summary. In ruby world UnitTest is considered to be old but it is still very effective tool. After working with rspec nothing seems to be as it was before, it is difficult to come back to UnitTest or PHPUnit for me.
I just started working with simpletest framework, and I have to say that testing is not enjoyable any more ;[ .
As a sidenote,I had to remove everything from the cache dir to get rid of some caching related warninigs before testing anything .
I have seen kaste's plugin for PHPUnit but haven't given it a try yet ... I will in next a few days, otherwise I'm blind before the last day of the year ;]]]