There may be a difference of opinion regarding topic but I think a press release should be along the lines of a feature as opposed to being a piece about what a business does. I believe that by doing the latter is how a release becomes advertising and not information with substance.
Some schools of thought believe releases could be about anything including the launch of a new business. When I write a release, I believe the content should be timeless and have staying power and should not be entirely written just about the business itself. So my point is that perhaps you can write a piece about something interesting you do or something intriguing which has happened around you and then incorporate the 'who you are and what you do' into that piece.
Often features are easier to write if you have the title down first. So let's say your title is, "Florida Business Woman Offers Virtual Assistance Services for Local Humane Society Charity" (for example only). The piece would be written about that topic thus incorporating the "who" and "what" you do into that piece as opposed to just writing a piece about the VA business. So in essence, the services you offer and the business you run becomes the back-up information to the topic. You could incorporate how VA work helped the charity and thus, the piece is not advertorial but you get the point across about the services you offer. The idea is to create interest with a topic the reader will find value in spending the time reading and then ease in the VA services description.
There is a great interview on the forums with Diana Ennen
here well worth reading several times over.
Jan