You can download and use the new Swype keyboard just go to this link, register and follow the instructions. Personally i love swype on mobile phones and although it does the job i found the tablet size made swyping the keys that much more difficult due to the distance my finger has to travel.
Thumb keyboard makes typing on tablets easy with features to customize the width of keys so if your got extraordinary short or long fingers then simply adjust the distance of the keys. Works very well with Nexus 7 and is recommended by users. Download from Google play. Price is £1.79