Sturgeon's Law states that "Ninety percent of everything is crap". I don't think I am being too controversial by suggesting that if Theodore Sturgeon had ever encountered mobile phone games he would have revised upwards.
There are decent games out there, but there is a lot of dross - derivative, badly designed and poorly implemented.
Nokia want to change all that. They have been running the Mobile Games Innovation Challenge - a competition that asks developers to submit their most innovative game designs for - running under Symbian or Java on N-Gage or standard Nokia handsets http://kotaku.com/5066623/nokia-seek...ation-has-cash