Type 1.5 is Type I (or Vintage, all old cards allowed), but with the restricted list banned.
Most of the decks that I build these days are Type 1.5. Some might find it odd that with the limited card set available in this game that I would choose a format that bans the most powerful cards. But when you find yourself adding 3rd and 4th colors just for a few restricted cards, always playing blue for the "power 9", all the decks start looking the same. So the effect of banning a number of cards is to actually add more variety to the game. Go ponder that one.
Download the full archive here: 
type_1-5.zip
I have also built a number of Type I and Type II decks, though Type II is rather silly in this game.
Decks
| Deck File | Colors | Posted |
|---|---|---|
| Island of Pain |   |
June 26, 2005 |
| Powerhouse | |
June 22, 2005 |
| Whatnaut | & artifact |
June 16, 2005 |
| Sedge Mine |   |
June 05, 2005 |
| Giant Howling Wurmies |  |
May 25, 2005 |
| Yawgmoth-Chi | |
May 24, 2005 |
| Blue Skies | |
May 5, 2005 |
| Lightning Sprites | |
April 24, 2005 |
| Hard to Kill | |
April 24, 2005 |
| Old Man Wolf | |
April 16, 2005 |
| Barbed Ape | |
December 19, 2004 |
| Poison Counter | |
December 19, 2004 |
| Juggernaut | |
December 7, 2004 |
| Leif's Type One and a Half | |
December 7, 2004 |
| Edge of What? | |
December 7, 2004 |
| On The Wings of Angels and Devils | |
December 7, 2004 |
| Unholy Alliance | |
December 7, 2004 |
| Armies Of Light | |
December 7, 2004 |
| Control | |
December 7, 2004 |
| Counter Spell | |
December 7, 2004 |
| Land Destruction | |
December 7, 2004 |
| Lich Spawn | |
December 7, 2004 |
| A Royal Pain | |
December 7, 2004 |
| Nils Type One and a Half | |
December 5, 2004 |
