FWIW, here's a useful tool for building learning objects and packaging up SCORM and IMS compliant packages. Now, I'm not saying that's a Good Thing or that it should be entirely necessary, but it does allow some kind of transferability between systems. The site also contains a number of links to Learning Design sites and some definitions of standards. It's Open Source too (which is a Good Thing).
I used this Reload tool once to see if I could package up a moodle course to transfer to another system (DigitalBrain). At the time, I was thwarted at the last hurdle because DB wouldn't allow me to unzip or install the package. I think they do now but I lost interest (in them). For my purposes and perception of what a VLE ought to offer, Moodle allows a far greater range of activities to support a number of learning styles (and therefore to support learners) than anything else I've seen. Now, my experience of these things is limited and I know the following is an over-simplification and will probably change as my experience grows, but if I want to build a linear Learning Object I'll choose the path of least bother and use Powerpoint (or the Open Office equivalent), embed any Flash or other resources and zip it up. However, if I want to build a content-rich, experience-rich learning environment I'll use Moodle and those who can't see the light and want to use my resources in another VLE can remove their blinkers and use Moodle or be damned, or put up with a bastardised zipfile of a moodle course and that they have to sort out the manifest themselves.
I might get more warmhearted towards Standards Compliancy if/when it sorts itself out and proves itself to be worthwhile to me. Until then, I'll carry on moodling.