Languages

Please add pypy (pypy.org/).
It can replace the loss of psyco for Python users.

Please update fpc to 2.6.4 (freepascal.org/)

How about upgrade Haskell to Haskell Platform 2014.2?

More details can be found https://www.spoj.com/forum/viewtopic.php?f=53&t=11555&sid=da4d69a531c4228b251c62699d1d96e23.

Can you add Rust as a supported language?

Rust will be available today or tomorrow (and set of new languages).

Currently SPOJ only has GHC, nowadays people choose Haskell Platform instead of GHC, Haskell Platform basically has GHC and several import libraries, including Vector, unordered-containers. you can think bare GHC (without haskell platform) of C++ without STL, it's very painful.
I enjoyed solving SPOJ problems with Haskell, even it's much more difficult than C++ due to the strict time limit; in fact the coolest feature of SPOJ to me is it has a haskell compiler. And I believe more and more people will enjoy FP.