You may want to join my forum too...
www.guildwargamers.com
Its the largest 20mm/1/72nd wargames forum on the web and concentrates on WW2 and Moderns. We have over 1000 members and a core of 200-300 active posters.
We also have all the leading 20mm makers on the forum too. Many use it to source ideas and show off new products.
I also work for Ambush Alley Games so if you want help with OOBs to theme pack composition I can offer that, but it would have to be via
PM as alot of the info is due to go in the Osprey books due for release next year.
If you want some tips as to what is likely to be 'hot' for 20mm next year, then drop me a line and I can fill you in on the four osprey supplements we have due for release.
I personally would suggest you concentrate on one theme and do full and complete ranges for it.
People like to be able to source everything in one style. The new Elhiem 2009 USMC range is a good example of this.
Also make sure your weapon masters are spot on, modern gamers are quite picky when it comes to weapons.
If you can get a quality close to these, you will do well...