Since two years, Alex Radeski and me created a project on google code
 called Bushel 
 . This project implements an OSGi manifest parser and an Ivy resolver
to manage OSGi dependencies with Apache Ivy.
Since, Nicolas Lavelée committer on Apache Ivy and the lead of Apache IvyDE
(Eclipse plugin for Ivy) joined us to contribute.
Now, Bushel implements some special Ivy resolver and version matching which
understand the different kind of OSGi dependency, and also understand the
repository descriptor OBR (OSGi Bundle Repository).
I'm pround to announce that our Bushel source code is promote as a part of
Apache Ivy core. 
Next step : Add the OSGi support on EasyAnt and EasyAnt For Eclipse
build system (based on Ivy stack) ...