The next top spot available is in April (there may be one also in March), but there is one second and/or third spot open over the next couple of months.   Because I won't be doing much blogging in May this year (busy teaching quarter in Spring), I won't be selling advertising exclusively for that month, but will offer, on a first-come, first-serve basis, those who book for April or June the opportunity to run their ad through May as well.  E-mail me for details.