I have to agree,
I swooped in at the last second in an effort to provide a website and wiki and that has helped keep things ticking over for a while, we aren't going anywhere, but if you are genuinely new to this scene from what I have been reading lately libgdx has vastly outgrown the capabilities of slick2d, and as such (despite not really knowing much about it) I would definitely recommend checking it out.
My project uses slick2d and it works nicely, but I have had to employ quite a number of tricks and tricky workarounds (heavily relying on TWL's underlying framework actually for thread hopping and other such things) to get functionality that slick simply doesn't support out of the box, as soon as you look to break outside of the libraries capabilities things become rather difficult. If you are reading this looking for information on how to get started with slick, give libgdx a google and do some research there beforehand. It is much more modern and better supported, and is actively under development at the time of writing.
Just my two pence

Liam