vtbobm... You might check out eFile, from Dynoplex, but I don't think it is going to be what you want. There really is not a "file explorer" for BB.
I don't know if BBToday is glitzier than PocketDay, could be... I like it, I just don't use to it's full extent either.
Both are here (look for BBToday under freeware, and eFile, look for eOffice under commercial):
3rd Party Application List - BlackBerryFAQ