i'd really like somthing like that .. besides, can you post links to some j2me apps collections ? the more the better as i've browsed some of them but haven't found exactly what i'm looking for.
As for apps that run with the phone (in the backgound), the only type i've found that can do that, are some linux portable apps called "elfs". But you'll have to patch your phone, add a library file and, of cource, running elfs in background will drain your battery faster but it may be acceptable to some extent.
I'm fairly new to this and i didn't installed any of them on my w810i from lack of free time but the feedback is enourmous and besides, i haven't found an elf to replace the calendar :( If anyone does please replay here with a link, thanks!

I hope this is usefull for you :)