First, plugging their site — http://thundercloud.net/
I have always loved using email stationery, and CloudEight has been my main stationery source since probably about year 2000 at least (just guessing in my head!). They also have a forum with postings on computer safety about issues such as spam, viruses, and related issues. Their stationery and other designs are declared virus free and I have always had super luck with them and they are varied and beautiful.
They also feature smileycons which I am a great fan of – I am a gold member.
Check them out – they’re awesome!
And thanks, CloudEight, for featuring my blog!