Thanks for the pointer boy W. The 2mm Yahoo group is an excellent resource for ideas on basing – both layout of the blocks and how to 'dress' the base without overwhelming the figure blocks.
I have examples in my collection from single strips on bases to bases with 10 strips. Some ideas ….
If using multiple strips per base then you can assist ID by having all the same type of troops based in the same arrangement.
Using rules that have strength points (or similar mechanisms) use that no of blocks – you can use small blocks for larger strengths so that you only need use a single base size for all.
Formations for H&M can be shown on the base with blocks in line, column, supported line, skirmishers out in front etc. etc. You can do all that on a single, reasonably sized base – more difficult to do convincingly at larger scales.
If using single strips then make the base thick enough to grab easily – 2mm are too small to pick up by the figure block. I magnetically base all mine but mount board is a good solution and readily available.
2mm terrain doesn't always need a base but it can be enhanced by combining separate bits together on a base and blending them into a single coherent 'landscape'. For that I'd say 2mm MDF is minimum for basing – and make sure you seal it both sides to reduce any warping. There are some very good examples of that on the IM website as well as in the Yahoo group.
Tony of TTT