Here's a few sites to check out:
http://www.wordplays.com/fcgi-bin/wc.pl?op=new (a game similar to boggle - The objective is to form words by concatenating adjacent letters. Letters that are to the left, right, on top, bottom, or on a diagonal to each other are all acceptable. A timer will count down and when time expires your score will be computed and compared to the computer's score.) You need to type the word then click the rectangle under it - to submit your word.
http://www.wordplays.com/p/wiw - Words in a word - they will give you a word - you then need to type as many words using only those letters - (you need to type the word then click on the rectangle - then click submit answers to see how many points you earned)
There are other typing games you could use on these sites as well -
Remember... learning to key well doesn't have to be boring... but it does take practice... AND you need to be consistent with your hand positioning. Bad habits are hard to break. :)
Enjoy!!