I have not read the whole thread, but I'm not aware of any on-line banks that offer a sort of 'electronic register'. It seems obvious to me, and easily implemented, but I guess no demand? An example:
Say I have a $1,234.56 balance in my 'checking account' (that I almost never write 'checks' from!). I know I have a electronic withdrawal coming up next week of $500. I'd like to be able to make that pending debit known to the account (if done through bill-pay on that account, it could be automatic), to see an adjusted balance that accounts for those known withdrawals, so it would show a 'reserve' of $734.56. So I know I can't write a check for more than that 'reserve'. And after that bill is paid, the 'reserve' and 'actual' balance would be the same (assuming no other known pending debits).
Like-wise, if I do write a check, I'd enter the amount and # into the account 'register' on-line, so I would see a lower 'reserve' balance. And when that #/amount check hits, it removes it from 'reserve' to actual.
It just mimics what most of us did with our old-time paper & pencil check registers.
Maybe this already exists somewhere? And I'm not talking about a separate program like Quicken, I mean integrated into the bank/CU checking account on-line.