features
 register
  account matching
   match transactions, not entries

$ ledger reg equi
2007/01/01 opening balance      equity:opening balan..       $-4.82       $-4.82
2007/01/25 balance adjustment   equity                       $91.15       $86.33
$ hledger reg equi
2007/01/01 opening balance      assets:cash                     $4.82      $4.82
                                equity:opening balances        $-4.82          0
2007/01/25 balance adjustment   equity                         $91.15     $91.15
                                assets:cash                   $-91.15          0
  description matching
  regexp matching

 balance
  show top-level acct balances
  show all account balances

 print
 more directives, eg include
 read timelog files
 -p period expressions
 -d display expressions
 -j and -J graph data output
 graph automation
 auto entry generation
 read gnucash files

testing
 ledger regression/compatibility tests

environment
 cleaner option processing
 robust ledger file finding

documentation
 literate docs
 haddock

marketing
 set up as a cabal/hackage project following wiki howto ?
 announce on haskell list, wiki