The other Srivaishnavam/astrology
related web site links are given hereunder. Sure, these sites are worth visiting.
http://www.ahobilam.com (No way it is connected to Sri Ahobilamutt excepting as its Sishyaas).
http://jyotisha.00it.com - a site devoted to Hindu system astrology - you
can just try it for once to check the accuracy.