That Anna is a regular on another site is something we can't all be expected to know, is it?
That Anna wanted to share a product she enjoys, is something we welcome, and appreciate - but for a first ever post to begin with an advertisement, can you really wonder that some are sceptical? After all, there are some very sophisticated spam programs that imitate real people - I get emails from them often.
Anna is very welcome here, and the amount of interest in the Slingbox indicates a subject that lots of us would like to know more about.
That we'd also like to know something about Anna is perfectly natural, I'd say. We like to know something about every one of the members who post here, because it's a community, not just a website.
So, welcome, Anna, to EO! We hope you'll post more, and become another valued member of the community here.