In Hollywood, new hotel developments are suddenly spreading like wildfire.  Back in July, rumblings emerged of a new 55-room boutique establishment setting up shop on Cahuenga Boulevard, in-between Sunset Boulevard and Selma Avenue.  Now, it appears that a significantly larger project is slated for a half-acre site one block west. According to a case filing published last week by the Department of City Planning, a mid-rise hotel tower is planned at 1523 Wilcox Avenue.  The proposed building would stand 12 stories, featuring an unspecified number of guest rooms, ancillary space and a penthouse.  Construction of the new hotel would first require the demolition of a low-rise commercial structure which currently stands upon the development site. The project would be located midway between tourist-heavy Hollywood and Sunset Boulevards, in a neighborhood which has experienced a noticeable increase investment during the past several years.  North on Selma Avenue, construction is underway on the 10-story, 182-room Dream Hollywood.  Approximately three blocks west, a similar hotel development is planned at the corner of Hollywood Boulevard and Cherokee Avenue.