You only have 25 seed word searches in Brainstorm.. but there's a partial way around it.. Say you put in 'weight loss'; you'll have a file with all results. Later, you can manually add a new word to that file. You'll get the stats for that single word and it doesn't count against the 25 searches.
By all means, wait for another special.. SBI always runs them. Meanwhile, I encourage you to begin the work for new site. There's tons of stuff you can do while waiting. Primarily, start researching niches that you're considering. I suggest even write an article or two.. Save article(s) to publish once your site is up. You'll get an idea if you like writing about that niche.
I've done a lot of sites, including paying close to $10k to have one built, and I can honestly say, SBI has the whole enchilada in one spot. Why reinvent the wheel?
The only negative thing I see about SBI.. and ironically, this is also one of their main benefits.. is they drive me nuts with their
endless, rambling information. Seriously, you can spend all your time reading instead of 'doing.'
My new, baby SBI site that I'm working on is:
Diet-Delivered.com