Although things have been very nautically inclined recently I have not been neglecting my ideas around the use of Bob Cordery's Portable Wargame series. For me the obvious fit would be WW1 and WW2 but I am also giving serious thought to something colonial. In fact, when I prepare the khaki army it would very simple to use some of the Tumbling Dice 1/600th open order infantry as loose order tribal irregulars of some type. Magister Militum have a large range of material in this scale - far larger than the Tumbling Dice offering - so cherry picking odds and ends from them would be a useful alternative. Mounted camels would be very handy indeed for a couple of ideas!
I also have a large selection of the Peter Pig troop blocks that are available as part of their Hammerin' Iron ACW naval range. This is quite limited but covers infantry, infantry skirmishers, cavalry, artillery and command bases. the infantry blocks are rather nice and would be ideal for pretty much anything close order and linear for the 19th century. I am toying with the idea of using these for Napoleonics at some point - and Bob has mentioned the possibility of a dedicated Napoleonic Portable Wargame at some point.
My original thought in respect of WW2 was to replicate the approach from Memoir 44 using Heroscape tiles and 1/600th scale models. So far I have limited myself to what models Tumbling Dice have produced which is fine for the infantry and for the more vanilla vehicles. By that I mean I have a Panzer 4 F2, Shermans and T34/85s. Trucks, halftracks, artillery and antitank guns as well as armoured cars and SPs will need to come from magister Militum but I will not need many of them for sure!
Terrain will be pretty straightforward and I already have a selection of pieces that would suitable - including some palm trees! There are a few pieces available in the Peter Pig 1/600th scale Hammerin' Iron range that are useful as well including a rather nice farm/homestead
One of the other ideas I have been messing around with it the use of the Portable Wargame in a non-gridded way. I reckon that the core mechanics could be readily taken off the grid and games fought over a 2ft square playing area, DBA style. This is not an entirely original thought but it is a mechanism used in the Peter Pig Hammerin' Iron ACW naval rules. They make use of a 'free hex' mechanism whereby all combat and movement was handled using hexes but not on a hex grid as such. The unit being moved was assumed to at the centre of a hex orientated with a hex side across the bow of the ship (see the picture above to see this in action). This representational hexagon would then have the normal six sides facing off the ship for movement, turning and firing etc using hexes as the unit of measure. I think it could work with land actions as well and would give the advantage of opening up the playing area. I think it could also be used with squares and in fact think that they would benefit even more given the restriction of having four sides as opposed to the six of a hexagon. It is something to ponder and I will give this some more thought in due course.