What are the advantages and disadvantages of selling a portion of your company's equity. Any thoughts or experiences will be greatly appreciated. TIA

Can you define what portion you are referring to? It depends on the portion actually. I once had have a company with reseller clients and shared clients, when I tried to sell just a part, such as just the shared or just the reseller, the offer is not so compelling anymore since larger web hosts would like to have your brand as well.