http://www.hubspot.com/
Fancy digital marketing thingy. Not exactly sure what it is or how well it works, but it's expensive, starts $3k/year.
http://featuredusers.com/
Buy or sell ads for twitter followers. Interesting, sales based on impressions.
http://www.owjo.com/
Sell on facebook and other places. They handle everything for 7% plus 3% + 30c for card processing, but they'll take cards for you, no merchant account required, through elavon.
http://www.pay4tweet.com/
A marketplace to buy and sell tweets. Prices are based on twittergrader.com's grading of your account.
http://twittergrader.com/
Get a grade for your twitter profile. I was rated 1m out of 8m, whatever that means. Used by pay4tweet.com to gauge price of paid tweets.
http://www.keywords-consultants.co.uk/
Link from Dafydd. Interesting business offering cost per acquisition based online marketing services. Worth pursuing at the relevant time.
http://flashtalking.com/
Tagline "Online advertising technology. made simple". Not quite sure what it does, but looks worth remembering.
http://wordpress.org/extend/plugins/sexybookmarks/
Nice social bookmarking plugin for WordPress. Creates really slick pop-up icons that are half hidden and jump upwards on mouseover. Very cool. From shareaholic.com (and maybe somebody called Josh Jones).
http://www.e-junkie.com/
Nice use of position:fixed for LiveChat, links to blog / facebook / twitter and tweet this, facebook like, google buzz, etc buttons. Very slick.
http://wufoo.com/
Form builder. Apparently that's it. Free option up to 100 entries a month, 3 forms. $15 a month for up to 500 entries over 10 forms. Seems pricey.
http://unbounce.com/
Create landing pages, starts from $25 a month for 1'000 unique visitors up to $500 a month for 100k uniques. They better generate conversions at those prices!
