Twitterberry (also of features are found lacking ...can't favorite tweets /add people)
social scope (can also update facebook status as well) has a severe memory link(still in alpha)
I prefer Twitterberry despite everything.
I hear there is a new program in beta testing tweet_genius but has not been released yet.
Q10! <- Love the 9000!! It's everything I wanted (minus enough ON BOARD memory)!!
<-9700 ---! more memory! small screen&keypad :( ->