If you miss the ability to edit your own shortcuts on the Treos (my Treo 650 lets me invoke the pre-defined shortcuts using the shortcut symbol, e.g.: s+Alt+Down+Down+Down+L+U = “Lunch” but doesn’t let me create my own like I could on previous Palm devices), then check out Shortcut5 from Mark Tamura. This freeware utility adds a “ShortCut5″ Preferences panel in which you can put your own macros, which are invoked with the . (period) key. Aside from just inserting boilerplate text, there a bunch of @@ codes to represent a slew of date and time fields, hard buttons, text fields, etc…

My two favorite custom shortcuts are:

.ds = @@y4-@@m2-@@d2 (date stamp in YYYY-MM-DD format, my favorite because it sorts most logically)
.dts = @@y4-@@m2-@@d2 @@ts (date and time stamp)