For those requiring a refresher course on their marsupialia (like myself), America Zoo has fairly detailed descriptions with pictures.
As to the cutest, I offer the Potoroo.
However, given the context of Perl6, perhaps the Tasmanian Devil is more apt, as my affinity for Perl5 has not yet been swayed by the Perl6 Synopses. Afterall, I imagine I'll have to transition to Perl6 at some point, which may be comparable to having my leg gnawed off (particularly with regard to white space prescriptions, ?? ::, et all).