I've been reading a lot, theming, applications, etc. A lot of people recommend:
- CategoriesSB (allows for app folder/category arrangement like in iOS4)
- SBSettings (Settings Extension)
- Finder OS X (creates an OS X Finder Bar)
- Winterboard (theming application)
- iBlank (creates blank icons for arrangement applications)
- Appbackup (backs up any Cydia applications in case of restore. Open it, backup all, then sync to iTunes which copies the appbackup file to your computer so if your iPad needs to be rejailbroken everything will be installed as your last backup by installing Appbackup then restore.
- MakeItMine - Changes the banner and/or carrier to anything you wish
- Netatalk - allows for access to your iPad from your Mac on the same wireless network in Finder, you can drag and drop files as you would any folder
Hope that helps.