WyndWarrior has released version 1.0 of iDashboard, an iPhone utility which mimics the widget functionality of Mac OS X.
A multi page dashboard for your iPhone! Features a world clock, a calendar, a weather widget, a working calculator, lockscreen dashboard, and double-tap Dashboard. Also will have available widget packs for download in Cydia. Customization features include: wall-papers with auto-dim and the ability to change wallpapers through the photo app.
A similar application has been developed by Steven Troughton-Smith but has not yet been released.
You can download the .deb file for iDashboard 1.0 here. You can find instructions on how to install it here.
This app works fine. However, it is very inconvenient to control. Clock and Weather cannot be changed in term of timezone and area. Have to press a button in order to access the Calculator located in the next page (it should be able to slide thru instead of clicking a button).