You gotta load it and play with it. You dont have to have a custom rom to change the look and performance of the phone. You can have your iphone by using one of the themes. Start with sbmobile shell. Its a free trial and you can use it for a few weeks for free. Theres a bunch of themes that you can apply to the sb mobile shell and there is a huge thread here and xda that will give you the themes. You got an afew iphones in there also. Play around with a few of the themes in spb then load then click the third link below to add this tool. It will give you a few more weeks of daytime fun with your spb theme.
http://forum.xda-developers.com/showthread.php?t=389106
http://forum.xda-developers.com/show...=424933&page=3
http://www.imarche.net/omnia/index.php
After that you can load some of the other themes that work with the stock rom and play with them. Be sure to load s2u2 if you haven't yet and get you iphone jones from that also. This should entertain you for awhile.