I've used JL_CMDER on my 8330 several times. Is it safe to assume that it will work on ALL Blackberry models? I'm thinking down the line and was wondering what will work and what won't work anymore when I move on from this model.

Thanks.

It's working fine on the 8900, 9500 and 9700 series.
It's based on a DOS program called Javaloader which works with all BBs.