Faith in Politics: Preparing Churches for the General Election 2010 (on the CTBI website) is a good place to start. From there you can download a guide to planning a hustings meeting or explore how to phrase questions to candidates on the doorstep.
King's College London's Faith & Public Policy Forum runs a series of seminars. The next is on Tuesday 13th April 2010, entitled Muslim Londoners:Tackling Terrorism and Islamaphobia with speaker Dr Robert Lambert MBE. Click link for more dates and details and transcripts of previous seminars.
If books are your thing there are a number of recently published topical titles:-
Richard Harries (former Bishop of Oxford, now Lord Harries of Pentregarth) offers Faith in Politics? Rediscovering the Christian Roots of our Political Values
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(Darton Longman and Todd ISBN 978-0-232-52787-2)
From the same publishers comes
Faithful Citizens: A Practical Guide to Catholic Social Teaching
and Community Organising by Austen Ivereigh
(ISBN 978-0-232-52789-6)
Nick Spencer and Jonathan Chaplin's God and Government is published by SPCK, with foreword by the Archbishop of Canterbury (ISBN 978-0-281-06071-9)
Also from SPCK Votewise Now! - helping Christians Engage with the Issues, edited by Rose Lynas with foreward by Joel Edwards
For a shorter read visit the Diocese of St Alban's website and read Bishop Alan Smith's article Don't be apathetic:vote! which concludes with a topical prayer