Good Question. Thumbs Up! - It should be fine, waiting a few weeks wouldn't hurt =0p...
My 1st generation iPad & iPhone 3G[s] are still on older firmware. Everything is running fine. I don't see the need to update, and risk loosing my untethered jailbreaks.
My iPad 2 is currently on firmware 4.3.4, and I've been waiting for a jailbreak to be released (hopefully untethered).
I generally skip every other product model. I had the original iPhone. I skipped the iPhone 3G. I upgraded to the iPhone 3G[s]. I skipped the iPhone 4. I'm not sure if I'm going to upgrade to the iPhone 4[s], because no has addressed my question about the battery life. > ***[New iPhones & Battery Life: Was this topic talked about?]***