The checkstyle ebuild is a year out of date. Need version 4.1 Update ebuild is here: http://cboservices.dyndns.biz/checkstyle.ebuild.tar.bz
*** Bug 105215 has been marked as a duplicate of this bug. ***
In the future, please attach files to the bug, rather than making them available on another site. You never know when your site might go down, or the files go unavailable. Additionally, if the changes between the old ebuild and new are fairly trivial, it would be enough to just attach a diff between them. Now for the ebuild itself... ' >=dev-java/commons-beanutils-1.7* ' is an invalid atom. It needs to be '>=dev-java/commons-beanutils-1.7' or '=dev-java/commons-beanutils-1.7* '. The latter is actually better, because commons-beanutils it would get you the slot of commons-beanutils you want.
Added to CVS, with some modifications. Thanks for reporting!