I’ve been using TwitterBerry for my BlackBerry Storm, but I don’t quite love it so much as I use more and more desktop and web based apps.  I feel like there are some features that I need, that would make things easier.  So until I have the time to learn the BlackBerry SDK and write my app, I’m going to list out what I think is important and useful.

• Multiple Accounts - (for Corporate and Personal) all tweets from people you follow will be integrated into main list and have capability to have color coding
• Groups - The app will have grouping capabilites (along with automated groupings (such as per account groupings and recent friends etc…) and groups can be accessed by swiping sideways on the list view (also the abiity to hide groups from swiping and only view from group list availble from main menu)
• Tweet Caching - The ability to cache a tweet while you are not able to access a mobile signal
• In-app Flagging - for followup gets added to the “Flagged” automatic Group
• Search tweets of my friends - You know you recall a friend that tweeted about something particular, so search only within those tweets

So this is the start of my “favourite” twitter mobile app.  I’ll add more as I come up with more ideas and wishes.  Let me know what ideas you think are important or ones you think don’t work for you.

UPDATE: Here’s another feature I’d like it to have as well:

• Email tweets or add to social bookmarking service like del.icio.us