The new Android plugin for Eclipse is now available (v8.0.1), and it fixes many bugs, and also became compatible with Eclipse Helios.
More informations here: ADT Plugin for Eclipse
A good review about the the updated plugin can be found here.
Sometimes Eclipse IDE gets really slow, which can be really annoying (especially when changing tabs, it takes a while to switch to the other one). Here is a quick solution, which makes it much more better: http://www.codeweblog.com/eclipse-adt-mac-version-tab-to-switch-slow-solution/.