My two cents: if the attorney is "competent" (and internet startup companies are complex but most business attorneys with background in IP would be competent) then it is the person you are best able to communicate with and who takes and interest in your questions and your business.
Good luck in you new venture.
The above is general legal and business analysis. It is not "legal advice" but analysis, and different lawyers may analyse this matter differently, especially if there are additional facts not reflected in the question. I am not your attorney until retained by a written retainer agreement signed by both of us. I am only licensed in California. See also avvo.com terms and conditions item 9, incorporated as if it was reprinted here.
There is definitely a specialization in startup law. No personal recommendations, but here are a few links that may be of interest: