It's interesting that LinkedIn chose dust.js as it doesn't get much attention compared to some of the other JS template languages (e.g. Mustache & Handlebars.js).
I used FreeMarker on a previous project, it's pretty cool ( http://freemarker.sourceforge.net/ ). There is also mustache.java ( https://github.com/spullara/mustache.java ). I heard about Velocity and StringTemplate, but never tried them out... I guess Groovy Server Pages could also be considered if one's company is open to Grails...
Anything else I should be aware of?
As far as limited, I looked at Django strictly for it's vaunted templating prowess and didn't see anything that isn't easily reproducible in JSP. There could be some magic there but I missed it.
For verbosity, sure, fn:toLowerCase(string) is technically more verbose than string|lower, but marginally so.
You mention an example where JSP fares best; there are a lot of examples that don't come out looking too great though, such as time/date/decimal conversion, the obnoxious syntax for if/else, etc. A lot of Django's other filters just don't exist in JSP.
But that aside, there are larger scale issues -- composition of templates via blocks in Django/Jinja, which is a lot easier and more flexible than Apache tiles; the lack of auto-escaping in JSP; and the forced XML syntax, even at the expense of valid HTML (see what it does to script includes or empty divs, without a <!-- --> in between).