Hello, I'm looking to use a on cam light with the Merlin and the vx2100.
Does anyone have any good suggestions?

I've just ordered the Obie 2 Light. Will let you know what I think of it soon.

where did you buy it from?

I just purchased this light:

http://www.bhphotovideo.com/bnh/controller/home?O=2025&A=details&Q=&sku=410736&is=REG&addedTroughType=categoryNavigation

I'll let you know how it fairs with the merlin.

I bought mine from Lemac Sydney, Australia.

Playing around with the Obie light. Weight-wise the Merlin works just fine with the Sony FX1 and the lightest Sony battery. The Obie is extremely light, even with the 2 batterys. It's not going to light a barn however. For fairly close shots (2-3 feet) on faces it just manages just to get a zebra pattern set at 12 db gain - exactly what I need it for. I had to re-calibrate the Merlin once I put the light on and I think I'll just leave it on permanantly.

Well, the light is not so good but it helps a little. I doubt I will ever use it.