Mark, as Darren said earlier PR doesn't mean higher rankings. Links in my experience are not solely responsible for top rankings. If we are talking about Yahoo & MSN then you can get number 1 spots with less than 10 links, if we are talking about Google then ok, he likes some more links (but not especially thousands). I've said it before to you, you've almost no seo on your site so how do you expect Google's robot to determine which words you are targeting when your site is so poorly optimised.
I'm sorry to sound harsh and I know that you seem to be doing a good job of promoting your site in the more traditional sense but you seem from an Internet angle to be like a boat drifting without oars, wherever the tide takes you, that's where you're going. If you believe faithfully in your roses do something serious about your site in terms of search engines because if you hang about much longer there'll be someone around the next corner who's got the money & faith to steer their own boat and know exactly where they are taking it.
I could buy an expired domain today (avoiding the 12 month Google lag and comes complete with established PR). Build a site on it about roses. SEO the site and be on page 1 of all major engines within a month of starting. All I'd need then are some roses and a machine for the printing. Do you see how easy it can be?
There's over 3,000 members on here with just a small handful posting. It's a business forum, how many members have thought seriously about doing what you're doing when the machine you use is available on Ebay for around a grand. It's a very small investment for a potentially huge & profitable business, just be careful you don't get swamped by your competitors wake.
Well done for getting this far with it.
